preheat oven to 350

cook macaroni. drain

melt margarine in large saucepan

add flour and whisk

whisk in milk and cook over medium heat until mix starts to bubble and thickens

stir constantly

add chunks of velveeta and allow to melt

salt and pepper

pour Mac into 13 x9 oblong baking dish

pour sauce over macaroni

bake for 20 minutes then put extra slices of cheese on top

bake for 5 minutes until. cheese melts

allow to cool then serve