Macaroni 'n' Cheese Pizza

Ingredients

1 pkg (7 oz) macaroni and cheese dinner mix
2 eggs, beaten
1/2 lb ground beef
3/4 cup chopped onion
1 and 1/4 cups pizza sauce
1 can (4 oz) mushroom stems and pieces, drained
28 pepperoni slices
1 cup (4 oz) shredded mexican cheese blend

Prepare macaroni and cheese according to package directions; gradually stir in eggs.
Spread onto a greased 12-in pizza pan.  Bake at 375 degrees for 10 minutes.  Meanwhile, in a large skillet, cook beef  and onion over medium heat until meat is no longer pink; drain.  Stir in pizza sauce.
Spread over macaroni crust.  Sprinkle with the mushrooms, pepperoni and cheese blend.  Bake for 10-15 minutes or until cheese is melted.