Slow-Cooker Hearty Vegetable and Lentil Stew

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A comforting, one-pot stew simmered to perfection in your slow cooker, featuring protein-rich lentils, hearty vegetables, and aromatic herbs for a satisfying weeknight meal. This vegetarian-inspired slow cooker (vegetarian) ready in about 375 minutes pairs brown lentils, large, diced onion, peeled and diced 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.

★ 3.7 (14 ratings) Prep: 15 min Cook: 360 min Serves 6 Vegetarian cuisine 220 cal/serving
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Ingredients

Instructions

  1. Step 1: Place rinsed lentils, diced onion, carrots, celery, minced garlic, diced tomatoes, vegetable broth, thyme, bay leaf, salt, and black pepper into the slow cooker, stirring to combine.
  2. Step 2: Cover and cook on LOW for 6-7 hours until lentils are tender and vegetables are soft.
  3. Step 3: Remove bay leaf, stir in chopped kale, and cook uncovered for 10 minutes until kale wilts and tender.

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Frequently asked questions

How long does Slow-Cooker Hearty Vegetable and Lentil Stew 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 Slow-Cooker Hearty Vegetable and Lentil Stew?

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 Slow-Cooker Hearty Vegetable and Lentil Stew?

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 Slow-Cooker Hearty Vegetable and Lentil Stew 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.

Is Slow-Cooker Hearty Vegetable and Lentil Stew vegetarian?

Yes — this recipe is tagged vegetarian based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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