1 lb ground beef
1 medium onion, chopped
1 bell pepper, chopped
2 cloves garlic, minced
1 packet taco seasoning
1 can (14.5 oz) diced tomatoes, undrained
1 can (10 oz) Rotel tomatoes with green chilies, undrained
1 can (15 oz) tomato sauce
1 cup water
8 oz spaghetti, broken in half
1 cup shredded cheddar cheese
Fresh cilantro, for garnish (optional)