melt 2 TBSP butter and add flour (forgot to include in ingredients - you need 1/2 c flour) to make a roux.
3
slowly add the 3 cups of milk to the roux, stir constantly. simmer for 3 mins or until thickened.
4
once the sauce has thickened a bit add parmesan, cheddar, and swiss. mix and allow cheese to melt, it should only take a few mins.
5
put elbows in 9x13 pan - pour sauce over macaroni
6
heat saucepan and melt 2 TBSP butter - add the breadcrumbs and stir until breadcrumbs take on all the butter. top macaroni dish with crumbs/butter mix and then top with a dusting of paprika.
7
oven at 350 degrees F - bake for 30 minutes. let rest for a few minutes before serving.