Ingredients

  • 3 tablespoons unsalted butter, divided
  • 1 small to medium onion, chopped
  • 12 ounces medium shell pasta
  • 6 ounces sharp cheddar cheese (preferably Vermont), grated
  • 1/2 tsp mustard powder
  • 1/4 teaspoon cayenne red pepper
  • 2 cups lowfat milk
  • 1 teaspoon salt
  • 1/2 teaspoon freshly ground black pepper
  • 1/2 cup coarse breadcrumbs

Method

  • Preheat oven to 350 F.
  • Saute chopped onion in 1 tablespoon of the butter until soft and pale golden.
  • Melt remaining butter and set aside.
  • Heat several quarts of water to boiling.
  • Boil pasta shells, stirring occasionally, until al dente.
  • Dont overcook, as they will cook further in the oven.
  • Drain.
  • In a large bowl, mix shells well with remaining ingredients except breadcrumbs and remaining 2 tablespoons of butter.
  • Grease a baking dish big enough to hold it all and add pasta/cheese mixture, spreading out evenly.
  • Top with breadcrumbs, sprinkle with melted butter, and bake for 45 minutes to 1 hour or until bubbly and top is brown.
  • (Cooking time will depend on size of baking dish.)