Macaroni and Cheese

Melt butter in 4 cup measure on high for 1 minute.

Stir in flour, salt, Worcestershire, mustard, and pepper. Gradually stir in milk.

Cook uncovered on high for 3 minutes. Stir. Cook on high for 1 minute until smooth and thickened.

Stir in 1 1/2 cups cheddar cheese.

Combine sauce and cooked macaroni. Pour into a 2 quart casserole. Combine remaining cheese and cracker crumbs. Sprinkle on top.

Cook uncovered on bake for 5-6 minutes or until mixture is bubbling.

Let stand, covered, 5 minutes before serving. Top with tomato slices if desired.