This mushroom and lentil soup is a nutritious and protein-packed option. Start by sautéing onions, garlic, and carrots in a pot until they are softened. Add sliced mushrooms and cook until they release their moisture. Transfer the mixture to a food processor and blend until smooth. Return the mixture to the pot, add vegetable or chicken broth, and simmer. Stir in cooked lentils and let it simmer until the flavors meld together. This mushroom and lentil soup is hearty, flavorful, and makes a satisfying meal.