Recipe from: http://cheese.food.com/recipe/delic.....-cheese-118181

I just added sliced sausage and frozen peas to it.

Ingredients
2 cups elbow macaroni
1 cup half-and-half
1 pinch cayenne
salt and pepper
2 cups sharp cheddar cheese
1 tablespoon butter, melted, for the casserole

Directions
Boil the macaroni for 4 minutes or until half-cooked (salt the water!)
In a medium saucepan heat the half-and-half with cayenne, salt and pepper. Add macaroni and 1 1/2 cups of the cheese and cook on medium heat until the cheese melts. Pour into a buttered casserole and top with remaining cheese.
Bake in a preheated 350F oven for 15 minutes until the cheese melts.