Quality-Checked Vegan Lentil Soup

By Lauren Mitchell, Test Kitchen Director · Reviewed by AislePrompt Editorial · Published 2026-04-04 · Updated 2026-04-04

A deeply flavorful soup where each ingredient is measured precisely for consistent texture and taste, with quality checks at every stage. This soups ready in about 55 minutes pairs brown lentils, medium onion, medium carrot for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 220 calories and feeds 6, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Ingredients

• 1 cup brown lentils
• 1 medium onion
• 2 medium carrot
• 2 celery stalks
• 3 cloves garlic
• 14 oz can diced tomatoes
• 4 cups vegetable broth
• 1 tsp dried thyme
• 1 bay leaf
• 1 tbsp lemon juice

Instructions

1. Step 1: Rinse 1 cup brown lentils under cold water until water runs clear, checking for debris (critical quality control step). Finely dice 1 medium onion, 2 medium carrots, and 2 celery stalks.
2. Step 2: Heat a large pot over medium heat. Add diced onion, carrots, celery, and 3 minced garlic cloves. Sauté for 8 minutes until vegetables are softened but not browned, stirring frequently to prevent sticking.
3. Step 3: Add 14 oz can diced tomatoes (undrained), 4 cups vegetable broth, 1 tsp dried thyme, and 1 bay leaf. Bring to a gentle boil, then reduce heat to low and simmer uncovered for 25 minutes until lentils are tender but not mushy.
4. Step 4: Remove bay leaf. Stir in 1 tbsp lemon juice and taste. Adjust seasoning with salt if needed, ensuring the soup has a balanced tang and depth before serving.