Red Lentil Soup

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Days 6–13

Plant Protein

Batch Cook

Anti-Inflammatory

Why This Recipe

Lentils are not a substitute for animal protein sources in this cycle — whey, chicken, salmon, and eggs provide complete amino acid profiles that lentils alone do not. But that is the wrong framing. The case for lentil soup is as a complement: 18 g plant protein per bowl, significant anti-inflammatory payload, and variety that makes adherence to the protocol sustainable across 14 days. The specific choice of red lentils matters. Green and brown lentils retain their shape after cooking and have higher fibre content in the final product. Red lentils fully dissolve when cooked, producing a smooth, creamy soup with lower fibre load than their relatives. This makes them appropriate from Day 6 onward — when the diarrhea-risk window is closing and the gut is recovering — rather than waiting until Day 10 for higher-fibre legumes. The turmeric content here is not incidental. This recipe contains a meaningful culinary dose — 1–1.5 tsp turmeric per batch — which the nutrition calendar notes is safe throughout the cycle. Curcumin (turmeric's active compound) has documented COX-2 inhibition and NF-κB pathway effects. The caveat on the nutrition page about curcumin supplementation at high doses interfering with irinotecan does not apply to culinary amounts.

Ingredients

• 300 g red lentils (dried) — rinsed until water runs clear
• 1.2 litres low-sodium chicken stock or vegetable stock
• 400 ml water (additional, for consistency)
• 1 medium onion, diced
• 4 garlic cloves, minced
• 2 medium carrots, diced
• 2 tsp ground cumin
• 1.5 tsp ground turmeric
• 1 tsp ground coriander
• ½ tsp black pepper
• 1 tbsp olive oil (for sautéing)
• Salt to taste — add at the end, salt added early toughens lentils
• Juice of half a lemon (add at the end — brightens the flavour significantly)

Optional:

• 400 g tin chopped tomatoes — adds body, lycopene, and mild acidity. Appropriate from Day 7 onward; avoid earlier if the gut is still sensitive to acidic foods.
• 1 tsp smoked paprika — depth of flavour without heat
• Small amount of chili flakes (Day 9+, if GI is stable and spice is tolerated)

Method

Step 1 — Sauté the aromatics
Heat olive oil in a large pot over medium heat. Add onion and carrot. Cook for 5–7 minutes until softened — do not rush this step with high heat, slow softening produces a sweeter base. Add garlic and cook a further 1 minute. Add cumin, turmeric, coriander, and black pepper. Stir for 30 seconds — blooming the spices in oil releases the fat-soluble aromatic compounds that make the flavour work.

Step 2 — Add lentils and liquid
Add rinsed lentils to the pot. Stir to coat with the spiced oil. Add stock, water, and tinned tomatoes if using. Stir to combine. Bring to a boil, then reduce to a simmer.

Step 3 — Simmer until dissolved
Simmer uncovered for 25–30 minutes, stirring occasionally. Red lentils fully dissolve — you will see them lose their shape and the soup will become thick and uniform. If too thick, add more water in 100 ml increments. The consistency should be slightly thicker than a creamy soup — pourable but not broth-thin.

Step 4 — Finish and adjust
Remove from heat. Add salt and lemon juice. Taste and adjust — the lemon is not optional, it lifts the flavour considerably. For a completely smooth texture, use a stick blender for 20–30 seconds. For a slightly textured result, leave as-is.

Step 5 — Portion and store
Divide into 4–5 portions. Refrigerate for up to 5 days. Freezes well for 3 months — freeze in individual portions. Reheat with a splash of water stirred in; it thickens significantly overnight.

Protein Boost: Adding Chicken

Shredding a portion of poached chicken breast into a bowl of this soup raises the protein from 18 g to ~55 g per serving — a substantial single-meal protein load. This is the most efficient way to use leftover poached chicken from a batch-cook, and it adds interest to both recipes without additional preparation time.

What to Serve With It

Days 6–8: Plain, with white rice or a slice of sourdough (if bread is tolerated). No high-fat accompaniments.

Days 9–13:

• A spoonful of non-fat Greek yogurt stirred in at serving — adds creaminess, ~5 g additional protein, and probiotic cultures
• Fresh coriander or parsley as a garnish — safe and adds micronutrients
• A small piece of wholegrain bread or pita (if fibre tolerance is confirmed)
• Olive oil drizzle (small — for flavour and fat-soluble nutrient absorption)

A Note on Legumes and Flatulence

Lentils contain oligosaccharides that feed gut bacteria and produce gas. This is a normal GI consequence of legume consumption, but during the diarrhea recovery window, additional gas and fermentation load is unwelcome. This is the specific reason this recipe is listed from Day 6 onward, not earlier. By Day 6, the irinotecan late-diarrhea risk window is typically closing and the gut is better equipped to handle the fermentation load. If GI symptoms extend past Day 6 in a given cycle, delay this recipe until symptoms resolve — do not eat it through active diarrhea episodes. Rinsing lentils well before cooking removes some surface oligosaccharides. This recipe's soft, fully dissolved texture also reduces the undigested starch load compared to whole lentils.

Fitting Into the Day

Lentil soup works best as a dinner or a late lunch on Days 7–13. In a typical Day 9 protein stack:

• Morning whey shake: 25 g
• Soft-scrambled eggs: 18 g
• Greek yogurt: 20 g
• Poached chicken (lunch): 40 g → running total: 103 g
• Lentil soup (dinner): 18 g → final total: 121 g

That hits the 120–130 g target with dietary variety across the day.

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