Preheat oven to 375 degrees F. For sauce, cook ground beef, onion, carrot, and garlic in a large saucepan over medium-high heat until meat is brown and vegetables are tender. Drain off fat. Stir in tomato sauce, tomato paste, the water, Italian seasoning, and pepper. Bring to boiling; reduce heat. Cover and simmer for 10 minutes, stirring occasionally.