Place all ingredients except cheeses in a large resealable freezer bag.
Place cheeses in a medium bag.
Remove excess air from both bags and seal.
Staple bags together above the seal.
Thaw.
Bring contents of large bag and 4 cups of water to a boil in a deep skillet.
Stir in 1 lb. small shell pasta.
Turn heat to medium-low.
Cook, stirring occasionally until pasta is cooked to al dente.
Top with the cheeses.
Cover and allow the cheeses to melt.