Lentil Soup - Crock Pot

INGREDIENTS:
1 onion, chopped
1/4 cup olive oil
2 carrots, diced
2 stalks celery, chopped
2 cloves garlic, minced
1 teaspoon dried oregano
1 bay leaf
1 teaspoon dried basil
1 (14.5 ounce) can diced tomatoes
2 cups dry lentils
8 cups water
2 cups spinach, rinsed and thinly sliced
2 tablespoons vinegar
salt to taste
ground black pepper to taste

Method:

1. In a large soup pot, heat oil over medium heat. Add onions, carrots, and celery; cook and stir until onion is tender. Stir in garlic, bay leaf, oregano, and basil; cook for 2 minutes.
2. Place in crock pot. Add water, lentils, and tomato.
3. Cook on medium heat for 8 hours
4. Turn up heat to high: add spinach, vinegar, salt and pepper. Let it cook for an hour

* Recipe adapted from allrecipies.com