Boil water and start cooking noodles

Preheat oven at 375°F

Melt the margarine in a small sauce pan

Wisk in flour

Wisk in milk gradually

Keep stirring at medium heat until sauce thickens

Mix in cheese until melted, then reduce heat to minimum

Mix egg whites with milk in a bowl with a fork

Pour noodles in casserole dish

Pour base mixture on top and mix in with noodles

Pour bechamel sauce evenly on top

Top with crumbled cheese

Sprinkle with bread crumbs

Bake for 20min