Seafood Mac and Cheese

Finely chop the green onion. Set Aside.
Grate the white cheddar cheese. Set aside.
Grate the mozzarella cheese. Set aside.
Melt the butter in a medium saucepan, or skillet.
Add the shrimp. Turn and stir shrimp until lightly done.
Remove shrimp from pan. Chop slightly when cooled. Add to the macaroni mixture.
Add the finely chopped onions to the saucepan, and sauté until tender.
Sprinkle flour over onions and mix well. Let cook and brown for about one minute.
Slowly add the milk, stirring constantly until the mixture begins to thicken.
Gradually add the grated Cheddar Cheese, stirring constantly until the cheese melts.