Ingredients
1 pound beef chuck, cut into 3/4-inch chunks
1 can (15 ounces) tomato puree
1 cup dried black beans, rinsed
1 medium red onion, chopped
2 garlic cloves, minced
3 tablespoons chili powder
Coarse salt and ground pepper
1/4 cup sour cream, for serving
Directions
In a 5- to 6-quart slow cooker, combine beef, tomato puree, beans, onion (reserve 1 tablespoon for garnish), garlic, chili powder, 2 cups water, 2 teaspoons salt, and 1/2 teaspoon pepper. Cover, and cook on high, 6 hours (or on low, 8 hours). Serve chili topped with sour cream and reserved onion.
Source: https://www.marthastewart.com/313267/slow-cooker-beef-and-black-bean-chili