Prep Time: 25
Cook Time: 25
Serves: Serves: 6
Cook macaroni according to package directions.
Place egg yolks in large bowl and egg whites in bowl of electric mixer. Add milk, onion, parsley, salt and pepper to bowl with egg yolks; mix well. Drain macaroni; add to milk mixture and toss well. Stir in 2-1/2 cups cheese.
Beat egg whites with electric mixer until stiff but not dry. Fold into macaroni mixture. Transfer to greased 11X7-inch baking dish or 1-1/2-quart casserole dish. Sprinkle remaining cheese over macaroni mixture.
Bake in preheated 350°F oven 25 minutes or until hot and bubbly.