- Nonstick cooking spray, such as PAM
- 1 14.5-ounce can petite-diced tomatoes, un-drained, such as Hunt's
- 1 Cup dry brown lentils, sorted, rinsed
- 1 Cup chopped yellow onion
- ¾ Cup chopped celery
- 2 Cups vegetable broth
- 2 Cups water
- 2 bay leaves
- ½ Teaspoon salt
Spray the inside of a 4-quart slow cooker with the cooking spray. Add the tomatoes, lentils, onions, celery, vegetable broth, water, bay leaves, and salt to the slow cooker; stir to combine.
Cover; cook on low for 8 hours or on high for 4 hours.
Remove and discard the bay leaves before serving.