In a skillet over medium heat, brown the ground beef until fully cooked. Drain excess fat.

Add the diced onion, garlic, bell pepper, and carrot to the skillet and sauté for about 5 minutes until softened.

Transfer the meat and vegetable mixture to the crockpot.

Add crushed tomatoes, tomato paste, tomato sauce, oregano, basil, sugar, salt, pepper, and water. Stir to combine.

Cover and cook on low for 4 hours or on high for 2 hours.

Stir occasionally and adjust seasoning if necessary before serving.