• Cook macaroni as label directs.
• Start heating oven to 400 F.
• Grease 1 1/2 pt casserole dish.
• Mince onion (about 4 Tsp); put in double boiler with 2 Tbsp butter.
• When butter is melted, stir in flour, mustard, salt and pepper.
• Slowly stir in milk; cook until smooth and hot, stirring often.
• Slice about 3/4 of cheese right into sauce; stir until cheese is melted.
• When macaroni is tender, drain into colander; turn into casserole.
• Pour cheese sauce over macaroni, tossing lightly with a fork so that all macaroni get nicely coated.
• Top  with rest of cheese.
• Toss bread crumbs with 4 Tsp melted butter.
• Sprinkle over cheese.
• Bake, uncovered for 20 minutes.

Serve : 6

Ready in : 45 Minutes