2 tablespoons butter or margarine
2 tablespoons all-purpose flour
1/3 cup beef broth
1 (8-ounce) can tomato sauce
1/4 teaspoon salt
1/4 teaspoon pepper
Melt butter in a small saucepan; whisk in flour, and cook, whisking constantly, 1 minute. Gradually whisk in broth and tomato sauce; reduce heat, and simmer until thickened. Whisk in salt and pepper.