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Red Lentil and Mushroom Soup

A hearty soup made with red lentils, mushrooms, onions, carrots, herbs, and lemon, topped with optional feta.

By Health Canada · From Canada's Food Guide · 14 ingredients
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Why it works: Mushroom and lentils work together. They rank in the top 10% of all ingredient pairs, and 79 recipes mention both. Both carry 1-hexanol, which smells resin, flower. The science ↓

The recipe

Serves 6
Timeabout 20 minutes

Ingredients

Contains: milk (auto-detected from the ingredients and method; we can miss things, so check labels)

Directions

Make the soup base

  1. Heat oil in a large pot over medium‑high heat. Cook mushrooms, onion, and carrot for about 5 minutes or until liquid evaporates from the mushrooms.

  2. Stir in parsley, oregano, thyme, and hot pepper flakes; cook for 1 minute.

  3. Add lentils and stir to combine.

Simmer and finish

  1. Add broth and water; bring to a boil.

  2. Reduce heat, cover partially, and cook stirring occasionally for about 20 minutes or until lentils are soft and falling apart.

  3. Stir in lemon rind and lemon juice.

Serve

  1. Ladle into bowls and sprinkle with feta cheese, if using.

By Health Canada. Recipe from Canada's Food Guide.

Steps grouped into stages for easier reading; the method is the source's own.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.

  1. Mushroom + lentilstop 10% of all pairs
    Aroma overlapmoderate
    Mentioned together79 recipes

    Shared aroma: 1-hexanol (resin, flower).

  2. Carrot + parsleytop 1% of all pairs
    Aroma overlapstrong
    Mentioned together8,053 recipes

    Shared aroma: myristicin (spice, warm).

  3. Oregano + thymetop 1% of all pairs
    Aroma overlapstrong
    Mentioned together791 recipes

    Shared aroma: beta-phellandrene (minty, terpene).

  4. Parsley + thymetop 1% of all pairs
    Aroma overlapstrong
    Mentioned together9,057 recipes

    Shared aroma: cuminaldehyde (Spicy, cumin).

  5. Parsley + peppertop 2% of all pairs
    Aroma overlapstrong
    Mentioned together34,118 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Red lentils
Break down during simmering to thicken the soup and give it body.
Mushrooms
Release their liquid and brown, adding savory depth to the soup.
Onion
Softens and sweetens as it cooks, forming the flavor base.
Lemon juice
Adds acidity that brightens the earthy flavors of the soup.
Feta cheese
Adds salty, tangy richness on top, where it is used.

The step that matters

Simmering the lentils. Lentils need enough liquid and gentle, partly covered simmering to soften fully without scorching on the bottom of the pot. Stirring helps prevent sticking and keeps the texture even.

Flavor stand-ins for the onion

How well each one fits the dish's main ingredients (olive, mushroom, carrot, parsley, oregano, thyme, pepper):

  1. Tomatobetter flavor fit
  2. Capsicumbetter flavor fit
  3. Potatobetter flavor fit
  4. Onionthe original

Fit is the average pairing score against olive, mushroom, carrot, parsley, oregano, thyme, pepper. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).

“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.

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