tomato gravy recipe

Ingredients: 2 tablespoons butter or vegetable oil 1 small onion, finely chopped 2 cloves garlic, minced 2 tablespoons all-purpose flour 1 can (14.5 ounces) diced tomatoes (or 4-5 fresh tomatoes, diced) 1 cup chicken or vegetable broth 1 teaspoon sugar (optional, to balance acidity) 1/2 teaspoon dried basil 1/2 teaspoon dried oregano Salt and freshly ground black pepper to taste