Slow-Cooked Chili

2 lbs. ground beef
2 16 oz. cans kidney beans - rinsed and drained
2 14.5 oz. cans diced tomatoes - undrained
1 8 oz. can tomato sauce
2 medium onions - chopped
1 green pepper - chopped
2 cloves garlic - minced
2 tbsp. chili powder
2 tsp. salt - optional
1 tsp. pepper
shredded cheddar cheese - optional

In a skillet, brown beef; drain. Transfer to a slow cooker. Add the next nine ingredients.

Cover and cook on low for 8-10 hours or on high for 4 hours.