Sweet Potato Stew 1 onion, chopped 4 cloves garlic, minced 2 bell peppers, any color, diced 1 to 2 cups water (start with 1 cup) 1 can (28 oz) diced tomatoes, with the juice 3 cups sweet potatoes, peeled and diced 2 cans black beans, drained and rinsed 1 can (7 oz) diced green chiles 1 cup tomato sa...