This tasty lentil soup makes a hearty, healthy meal, and it couldn't be easier to make--quickly sauté some vegetables and add them with the remaining ingredients to your slow cooker.
Warm the olive oil in a skillet over medium heat. Add the onions, carrots, and celery and cook until the vegetables have softened, about 5 minutes. Add the garlic and cook 1 more minute. Transfer the vegetables and any juices to a 5- to 6-quart slow cooker.
Add the next 6 ingredients, cover the slow cooker, and cook on low for about 8 hours.
Stir the soup well and season to taste with salt and pepper.
