Rub chicken breasts with oil. Combine salt, pepper and cumin and sprinkle over all sides of chicken. Place in crock cooker.
Pour in last 4 ingredients (onion through tomatoes), being careful to not rinse off spices on chicken, and cover with the lid.
Cook for 4 hours on high, or until the chicken is cooked through and the sauce thickens. Stir and serve.
Notes
SERVING SUGGESTION: Steamed green beans and faux-tay-toes (steam cauliflower till tender; drain; mash with butter, cream cheese and salt and pepper to taste till you get a mashed potatoes texture).GLUTEN FREE: Make sure canned tomatoes and chipotle pepper are gluten free.NUTRITION: 251 Calories; 13g Fat (45.1% calories from fat); 28g Protein; 6g Carbohydrate; 1g Dietary Fiber; 115mg Cholesterol; 148mg Sodium. Exchanges: 0 Grain (Starch); 4 Lean Meat; 1 Vegetable; 1 1/2 Fat.