1. Heat oven to 350 degrees F. Clean and slice 1/2 pound asparagus.
2. Cook one 7.25-ounce box of macaroni and cheese following package directions and reserving seasoning mix. Add asparagus to macaroni water after 3 minutes of cooking. Continue cooking until macaroni and asparagus are just tender; drain.
3. Combine egg yolks, mustard, milk, butter, seasoning mix and diced smoked ham in large bowl. Add hot cooked macaroni. Beat egg whites in medium-size bowl until stiff peaks form; fold into macaroni mixture.
4. Pour into buttered 2-quart baking dish. Bake in 350 degrees F oven 20 to 25 minutes.