Preparation - Place the butter or margerine in a 1 quart glass bowl or measuring cup. Microwave on full power for about 45 seconds or until melted. Whisk in the flour and seasonings. Add the milk and whisk until smooth. Microwave on full power for about 3 minutes or until the sauce is thickened. Whisk again. Use as a base for cheese sauces, in creamed chopped beef, in creamed vegetables, in casseroles or whenever a basic white sauce, or roux, is called for.