In the slow cooker add the chopped cabbage, rice, water, pepper, garlic salt, sugar, tomato sauce and diced tomatoes.
1 small head of cabbage, 2 1/2 cups water, 1 cup uncooked minute rice, 1 teaspoon black pepper, 1 1/2 teaspoon garlic salt, 1 teaspoon granulated sugar, 28 ounces tomato sauce, 14 ounces petite diced tomatoes