55 min — Medium — American
A roux of butter and flour thickened with two and a quarter cups of milk becomes the base for a three-cheese sauce — sharp cheddar, Muenster, and Gruyère — seasoned with a teaspoon of Dijon mustard. Thinly sliced red bell pepper, green onions, and precooked bacon pieces go into the sauce with cooked penne, then the whole pan gets an Italian breadcrumb crust made with a tablespoon of melted butter. Bakes in about 30 minutes. Freeze the assembled, unbaked dish and add 15 extra minutes in the oven when cooking straight from frozen.