Creating your Slow Cooker Lentil Stew is a delightful process. Follow these simple steps:

1. Prepare the Lentils: Rinse the lentils under cold water and set aside.
2. Chop Vegetables: Dice the onion, carrots, and celery. Mince the garlic.
3. Add Ingredients: In your slow cooker, combine the lentils, broth, onion, carrots, celery, garlic, diced tomatoes with juices, cumin, paprika, thyme, and salt and pepper.
4. Stir to Mix: Gently stir the ingredients until well-combined.
5. Slow Cook: Cover the slow cooker with the lid. Set it to low for 6-8 hours, or high for 3-4 hours.
6. Check Consistency: Near the end of cooking, check the lentils. They should be tender. Add more broth or water if it seems too thick.
7. Add Spinach: Stir in the fresh spinach or kale about 15-30 minutes before serving to allow it to wilt.
8. Adjust Seasoning: Taste the stew and adjust seasoning, adding lemon juice for brightness if desired.
9. Serve Warm: Ladle the stewed lentils into bowls.

These steps will guide you in effortlessly crafting a satisfying and nutritious stew that everyone will appreciate.