Learned Lentil Soup with Rosemary

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

A slow-cooked lentil soup inspired by the steady growth of homeschooling communities nationwide. This mediterranean-inspired slow cooker ready in about 375 minutes pairs brown lentils, vegetable broth, medium carrots 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.

Prep: 15 min Cook: 360 min Serves 6 Mediterranean cuisine 220 cal/serving
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Ingredients

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Instructions

  1. Step 1: Finely chop 1 onion, 2 medium carrots, and 2 stalks celery. Heat 2 tbsp olive oil in a slow cooker over medium heat, adding vegetables and sautéing for 5 minutes until softened.
  2. Step 2: Add 1 cup rinsed brown lentils, 4 cups vegetable broth, 1 tbsp chopped fresh rosemary, and 1 tsp dried thyme to the slow cooker. Stir well to combine.
  3. Step 3: Cover and cook on low for 6 hours until lentils are tender and broth is slightly thickened, stirring once halfway through cooking.

Frequently asked questions

How long does Learned Lentil Soup with Rosemary take to make?

Total time is about 375 minutes (15 min prep + 360 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Learned Lentil Soup with Rosemary?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep brown lentils from drying out.

Can I substitute ingredients in Learned Lentil Soup with Rosemary?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Learned Lentil Soup with Rosemary for a different number of people?

The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Learned Lentil Soup with Rosemary?

Mediterranean slow cooker like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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