- Easy
- 40 min
- 6 serv.
- 16 synergies
- Now at its best: Onion
A spiced Middle Eastern lentil soup with red lentils, tomato, carrot, turmeric, cumin and a fresh touch of lemon.
This lentil soup has exactly the deep, warming character you want on a busy day: soft, spiced and still fresh enough not to feel heavy. Red lentils break down naturally as they simmer, giving the soup a full, almost velvety texture. Onion, garlic and ginger create a fragrant base, while cumin and turmeric add that warm, earthy depth. Tomato and carrot bring roundness and gentle sweetness, and the lemon at the end lifts everything beautifully. A simple bowl of soup, but with the flavour of something that tastes as if it has been simmering for hours.
- 10
- min prep
- 30
- min cook
- 40
- min total
Nutritional Synergies
This recipe combines ingredients that enhance each other:
Vegetable stock 
Ginger Warm broth + gingerols for digestion and hydration
Technical: Vegetable broth provides electrolytes (sodium 350-500mg/L, potassium 200-400mg/L) for hydration and osmotic balance. Ginger's gingerols promote gastric motility and bile production. Warm fluids accelerate gastric transit.
What does this mean for you? Vegetable broth with fresh ginger is an ideal warm drink during recovery. The electrolytes hydrate, the gingerols support digestion.
DigestionImmune System
Vegetable stock 
Turmeric Mineral-rich broth + curcumin for immune and recovery
Technical: Vegetable broth contains leached minerals (potassium, magnesium, sodium) and glutamate (umami flavor). Turmeric's curcumin (3-5%) modulates NF-kB and COX-2 signaling pathways. The warm broth increases curcumin bioavailability by improving solubility (heat + aqueous matrix). Glutamate in broth also activates T-cell receptors.
What does this mean for you? Add turmeric (plus black pepper) to vegetable broth for a powerful recovery soup. Ideal when you're feeling unwell or recovering from exertion.
Immune SystemAnti-inflammatory
Garlic Ginger Allicin + gingerols: complementary bioactive action
Technical: Garlic's allicin works via thiol enzyme inhibition — effective against gram-positive bacteria (Staphylococcus, Streptococcus). Ginger's gingerols and shogaols influence viral replication and stimulate interferon production. Together they cover both bacterial and viral pathways.
What does this mean for you? Garlic-ginger tea is a classic combination. Garlic works via thiol enzymes, ginger via interferon pathways. Cut both fresh for maximum active compounds — allicin only forms after 10 minutes of air exposure.
Immune System
Cumin Garlic Double digestive support: enzymes + bioactive compounds
Technical: Cumin promotes digestive enzyme activity (amylase, lipase, protease) and increases bile flow. Garlic's allicin has broad bioactivity targeting pathogenic gut bacteria while sparing beneficial ones.
What does this mean for you? Fry garlic and cumin together as base for curries, soups and stews. Classic combination in virtually every cuisine in the world.
DigestionImmune System
Cumin Turmeric Classic curry base with enhanced digestion
Technical: Cumin promotes production of digestive enzymes (amylase, lipase, protease) and increases bile flow. Turmeric's curcumin modulates NF-κB and COX-2 signal transduction and supports hepatobiliary activity via bile stimulation. Together they provide enhanced digestion + bioactive action.
What does this mean for you? Cumin + turmeric is the base of every curry. The cumin promotes your digestion, the turmeric adds bioactive action — the perfect combination for a nutritious curry.
DigestionAnti-inflammatory
Cumin 
Olive oil Fat activates volatile oils and increases cuminaldehyde absorption
Technical: Cumin's active compounds (cuminaldehyde, cymene, terpinene) are volatile, fat-soluble compounds. Frying in olive oil extracts and stabilizes these compounds, and the fat improves their gut absorption.
What does this mean for you? Briefly fry cumin in olive oil before adding other ingredients (tadka/tempering). This is why Indian and Middle Eastern cuisines always fry cumin in oil.
DigestionAnti-inflammatoryBlood Sugar
Cumin 
Black pepper Piperine increases absorption of cumin's active compounds 2-3x
Technical: Cumin contains cuminaldehyde and thymoquinone with digestive-promoting and bioactive properties. Piperine from black pepper inhibits CYP3A4 enzymes, reducing breakdown and improving absorption 2-3x.
What does this mean for you? Always add black pepper to dishes with cumin. This is why many spice blends (garam masala, ras el hanout) contain both.
DigestionAnti-inflammatory
Turmeric Ginger Enhanced bioactive action via two pathways
Technical: Turmeric and ginger belong to the same plant family (Zingiberaceae). Curcumin (turmeric) modulates NF-kB, while gingerol (ginger) modulates COX-2 and LOX (lipoxygenase). Because they target different signaling pathways, they enhance each other's bioactive action.
What does this mean for you? Turmeric + ginger in curry, soup or tea — two related spices that work bioactively via different pathways. Broader together than alone.
Anti-inflammatoryJoints
Turmeric Black pepper Increases curcumin absorption by 2000%
Technical: Curcumin from turmeric has bioavailability below 1% due to rapid glucuronidation in the liver. Piperine from black pepper inhibits UGT (UDP-glucuronosyltransferase) and CYP3A4, preventing curcumin breakdown. This increases bioavailability by 2000% (20x). Use ratio ¼ teaspoon pepper to 1 teaspoon turmeric.
What does this mean for you? ALWAYS add black pepper when using turmeric. Without pepper your body absorbs virtually nothing — with pepper 20x more. This is the most important food synergy there is.
Anti-inflammatoryJointsFocus
Olive oil Garlic Aglio e olio: allicin + oleocanthal via complementary biochemical pathways
Technical: Garlic contains allicin (formed when cutting/crushing) that influences HMG-CoA reductase (involved in lipid metabolism). Olive oil contains oleocanthal that modulates COX-1/2 enzymes. Together they influence lipid metabolism and prostaglandin cascade via complementary biochemical pathways. The fat also helps absorb fat-soluble garlic compounds.
What does this mean for you? Gently warm garlic in olive oil (don't burn!) as the base for many dishes. This is why 'aglio e olio' pasta is so beloved — two bioactive compounds that reinforce each other.
HeartImmune System
Olive oil 
Tomato Mediterranean golden rule: fat increases lycopene absorption 4x
Fat significantly increases lycopene bioavailability (PMID: 15927929)
Technical: Tomatoes contain lycopene (3-7mg per 100g), a carotenoid with strong antioxidant action. Lycopene is fat-soluble with only 10-15% absorption without fat. Olive oil increases this to 40-60% (2.5-4x improvement). Cooking further increases lycopene bioavailability.
What does this mean for you? Always add olive oil to tomato dishes — sauces, salads, bruschetta. This is why Mediterranean cuisine is so healthy. Cooked tomatoes with olive oil = maximum lycopene.
HeartSkin & Hair
Red lentils Tomato Tomato increases iron absorption from lentils
Technical: Red lentils contain 3.3mg non-heme iron per 100g. Tomatoes provide vitamin C (14mg per 100g) plus citric acid and malic acid that promote iron absorption. When slow-cooked (stew/dal), tomatoes concentrate, increasing organic acid content. This is the basis of Indian dal — one of the most nutritious plant-based dishes.
What does this mean for you? Cook red lentils with fresh or canned tomatoes for a nutritious dal. The tomatoes increase iron absorption, and cooking the lentils makes them softer and more digestible. Add turmeric and cumin for an authentic Indian result.
Energy
Onion Garlic More than 20 organosulfur compounds in one soffritto
Technical: Onion contains diallyl disulfide and quercetin (20-40mg/100g). Garlic contains allicin, ajoene and S-allylcysteine. Together they provide more than 20 different organosulfur compounds that modulate NF-κB. Allium crops are intensively studied in nutrition science for their unique sulfur chemistry.
What does this mean for you? Start every dish with sautéed onion and garlic — not just for flavor, but for the unique concentration of organosulfur compounds. Cut garlic 10 minutes before heating to allow allicin formation.
DigestionImmune System
Onion Tomato Quercetin + lycopene: synergistic polyphenol-carotenoid combination
Technical: Quercetin from onion (20-40mg/100g) and lycopene from tomato (2573μg/100g) work through different mechanisms. Quercetin chelates metal ions and modulates lipid peroxidation, lycopene quenches singlet oxygen. Combined polyphenols and carotenoids work synergistically — the combination works through complementary mechanisms.
What does this mean for you? Tomato sauce with onion is the base of nearly every Mediterranean cuisine — and rightly so. Quercetin and lycopene enhance each other's action through complementary biochemical pathways. Cooking in olive oil makes carotenoids more absorbable.
HeartAnti-inflammatory
Carrot Olive oil Up to 5x more beta-carotene absorption
Technical: Carrot contains 8285μg beta-carotene per 100g, but bioavailability from raw carrot is only 3-4%. Heating + olive oil increases this to 20-25%. Oleic acid (73% of olive oil) forms mixed micelles that efficiently transport beta-carotene to enterocytes for absorption.
What does this mean for you? Roast carrots with olive oil or eat them in a salad with dressing. Without fat you absorb only 3% of beta-carotene — with olive oil up to 5x more.
Skin & HairFocusImmune System
Black pepper Olive oil Fat increases piperine absorption and enhances polyphenols
Technical: Piperine is fat-soluble and absorbed 2-3x better with dietary fat. Olive oil's oleocanthal and piperine both modulate COX signal transduction through different mechanisms, providing additive bioactive effect.
What does this mean for you? Grind fresh pepper over salads with olive oil dressing. The combination enhances both pepper absorption and bioactive action.
Anti-inflammatoryHeartDigestion
Instructions
- 1 Rinse the red lentils in a sieve under cold water until the water runs almost clear.
- 2 Heat the olive oil in a large soup pot and sauté the onion for 4 minutes over medium heat.
Nutrition per serving
Indicative values per serving.
Timing & Suitability
Shelf life: 5 days in fridge