This hearty vegetarian mushroom lentil soup is a perfect comfort dish for chilly days. Packed with nutritious lentils, mushrooms, and a medley of vegetables, it's both satisfying and flavorful. The combination of thyme and garlic adds a fragrant touch, making this soup a delightful addition to your meal rotation.
While most of the ingredients in this recipe are common pantry staples, you might need to pick up lentils and vegetable broth if you don't already have them. Lentils are often found in the dried beans section, and vegetable broth is usually located in the soup or broth aisle. Make sure to get fresh mushrooms from the produce section for the best flavor.

Ingredients For Vegetarian Mushroom Lentil Soup
Lentils: These are the main protein source in the soup, providing a hearty texture and earthy flavor.
Mushrooms: They add a rich, umami taste and meaty texture to the soup.
Onion: Adds a sweet and savory base flavor when sautéed.
Garlic: Provides a pungent, aromatic depth to the soup.
Carrots: Adds a touch of sweetness and color.
Celery: Contributes a subtle, slightly peppery flavor and crunch.
Vegetable broth: The liquid base of the soup, enhancing the overall flavor.
Thyme: A fragrant herb that adds a subtle earthy note.
Salt: Enhances the flavors of all the ingredients.
Ground black pepper: Adds a hint of spice and warmth.
Technique Tip for This Recipe
When sautéing the onion, garlic, carrots, and celery, make sure to cut them into uniform pieces. This ensures even cooking and enhances the overall texture of the soup. Additionally, don't rush the sautéing process; allowing the vegetables to soften and develop a slight caramelization will add depth and richness to the flavor of the final dish.
Suggested Side Dishes
Alternative Ingredients
lentils - Substitute with chickpeas: Chickpeas provide a similar texture and protein content, making them a good alternative in soups.
mushrooms - Substitute with eggplant: Eggplant has a meaty texture that can mimic the mouthfeel of mushrooms in soups.
onion - Substitute with leeks: Leeks offer a milder flavor and can be used in place of onions for a different but pleasant taste.
garlic - Substitute with shallots: Shallots provide a subtle garlic-like flavor and can be used to add depth to the soup.
carrots - Substitute with sweet potatoes: Sweet potatoes add a similar sweetness and color to the soup while providing additional nutrients.
celery - Substitute with fennel: Fennel has a slightly sweet and anise-like flavor that can add a unique twist to the soup.
vegetable broth - Substitute with miso broth: Miso broth adds a rich umami flavor, enhancing the overall taste of the soup.
dried thyme - Substitute with dried oregano: Dried oregano offers a different but complementary herbal note to the soup.
salt - Substitute with soy sauce: Soy sauce can add both saltiness and umami, enriching the flavor profile of the soup.
ground black pepper - Substitute with white pepper: White pepper provides a similar heat but with a slightly different flavor, adding a subtle complexity to the soup.
Other Alternative Recipes Similar to This Soup
How to Store or Freeze This Soup
Allow the soup to cool completely before storing. This helps prevent condensation, which can lead to a watery texture.
Transfer the vegetarian mushroom lentil soup into airtight containers. Glass containers with tight-fitting lids are ideal for maintaining freshness and preventing leaks.
For short-term storage, place the containers in the refrigerator. The soup will stay fresh for up to 4-5 days. Make sure to label the containers with the date to keep track of its freshness.
If you plan to store the soup for a longer period, freezing is the way to go. Divide the soup into individual portions to make reheating easier and more convenient.
Use freezer-safe containers or heavy-duty freezer bags for freezing. Leave some space at the top of the containers or bags to allow for expansion as the soup freezes.
Label the containers or bags with the date and contents. This helps you identify the soup later and ensures you use it within a reasonable time frame.
The soup can be frozen for up to 3 months. Beyond this period, the quality may start to decline, although it will still be safe to eat.
When ready to enjoy, thaw the soup in the refrigerator overnight. This gradual thawing helps maintain the texture and flavor.
Reheat the soup on the stovetop over medium heat, stirring occasionally until heated through. You can also use a microwave, heating in short intervals and stirring in between to ensure even heating.
If the soup appears too thick after reheating, add a splash of vegetable broth or water to reach your desired consistency. Adjust the seasoning if needed to refresh the flavors.
How to Reheat Leftovers
For stovetop reheating:
- Pour the leftover soup into a medium-sized pot.
- Heat over medium heat, stirring occasionally to ensure even heating.
- Once the soup begins to simmer, reduce the heat to low and continue to heat for another 5-10 minutes, or until thoroughly warmed.
- Taste and adjust seasoning if needed before serving.
For microwave reheating:
- Transfer the leftover soup into a microwave-safe bowl.
- Cover the bowl with a microwave-safe lid or a plate to prevent splatters.
- Heat on high for 2-3 minutes, stirring halfway through to ensure even heating.
- Continue to heat in 1-minute intervals, stirring in between, until the soup is hot throughout.
- Let it sit for a minute before serving to allow the heat to distribute evenly.
For oven reheating:
- Preheat your oven to 350°F (175°C).
- Pour the leftover soup into an oven-safe dish.
- Cover the dish with aluminum foil to prevent the soup from drying out.
- Heat in the oven for about 20-25 minutes, or until the soup is hot and bubbling.
- Carefully remove from the oven, stir, and serve.
For slow cooker reheating:
- Transfer the leftover soup into your slow cooker.
- Set the slow cooker to low and heat for 2-3 hours, or until the soup is thoroughly warmed.
- Stir occasionally to ensure even heating.
- Once heated, switch the slow cooker to the warm setting until ready to serve.
Essential Tools for Making This Soup
Large pot: To cook the soup and hold all the ingredients.
Splash of oil: Used to sauté the vegetables.
Knife: For chopping the onion, carrots, and celery.
Cutting board: A surface to chop the vegetables on.
Wooden spoon: To stir the ingredients while cooking.
Measuring cups: To measure the lentils, vegetable broth, and other ingredients.
Measuring spoons: To measure the thyme, salt, and pepper.
Garlic press: To mince the garlic cloves.
Ladle: For serving the soup once it's done cooking.
How to Save Time on This Recipe
Pre-chop vegetables: Chop the onion, carrots, and celery in advance and store them in the fridge.
Use pre-sliced mushrooms: Buy sliced mushrooms to save time on preparation.
Rinse lentils ahead: Rinse the lentils and let them drain while you prep other ingredients.
Batch cook: Double the recipe and freeze half for a quick meal later.
Use a food processor: Quickly chop vegetables using a food processor.
Pre-measure spices: Measure out the thyme, salt, and pepper before you start cooking.

Vegetarian Mushroom Lentil Soup
Ingredients
Main Ingredients
- 1 cup Lentils rinsed
- 2 cups Mushrooms sliced
- 1 medium Onion chopped
- 2 cloves Garlic minced
- 1 cup Carrots diced
- 1 cup Celery diced
- 6 cups Vegetable broth
- 1 teaspoon Thyme dried
- 1 teaspoon Salt or to taste
- ½ teaspoon Black pepper ground
Instructions
- 1. Heat a large pot over medium heat. Add a splash of oil.
- 2. Add the chopped onion, garlic, carrots, and celery. Sauté until softened, about 5-7 minutes.
- 3. Add the sliced mushrooms and cook for another 5 minutes.
- 4. Stir in the lentils, vegetable broth, thyme, salt, and pepper.
- 5. Bring to a boil, then reduce the heat and let it simmer for about 30-35 minutes, or until the lentils are tender.
- 6. Adjust seasoning if needed. Serve hot.
Nutritional Value
Keywords
Suggested Appetizers and Desserts for This Soup
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