Chili with Beef and Beans

2 pounds ground round or ground chuck
1 cup chopped onions
2 cans (16 ounces each) pinto beans or kidney beans, drained and rinsed
2 cans (14.5 ounces each) diced tomatoes
1 green bell pepper, coarsely chopped
2 cloves garlic, crushed
2 tablespoons chili powder
1 teaspoon ground cumin
1 teaspoon ground black pepper
salt to taste

Brown ground beef with onions; drain off excess fat. Combine beef and onions with remaining ingredients in slow cooker. Stir to blend. Cover and cook on LOW for 9 to 11 hours.