Creamy Red Cabbage Pasta

Name: Creamy Red Cabbage Pasta
Ingredients: 1 onion, roughly chopped; 9 garlic cloves, roughly chopped; 1/2 cup water; salt and pepper to taste; 1 cup heavy whipping cream; 1 tablespoon cornstarch; 1/2 cup Parmesan cheese, grated; pinch of ground nutmeg; 1/2 cup red cabbage; 2 roma tomatoes, diced; 1 pound spaghetti noodles, or other pasta