Saute a chopped medium onion in oil or water(your choice) until cooked and add to a saucepan containing two cups of milk.
Heat until almost boiling and stir in three cups of grated extra sharp cheddar. When the cheese is melted, add a medium size jar of chopped pimentos ( drained or not).
Boil a 16 oz package of macaroni for 8 minutes or tender and drain well.
Stir it together with the cheese sauce. Pour the whole thing in a large (13 inch) cake pan.
Cube one pound of extra sharp cheddar and push all the cubes into the macaroni mixture. Sprinkle paprika over the top and bake at 350 until the the cubes of cheese that are showing are melted.
You can add salt or pepper if you choose and use sharp cheddar instead of extra sharp. If you don't use any salt in the recipe, a tiny bit sprinkled over a serving really brings out the cheese flavor. Any thing left over can be cut into squares and frozen