Cook pasta in large saucepan as directed on package, omitting salt. Meanwhile, mix all remaining ingredients except shredded cheese until blended.
Drain pasta.
Add to cream cheese mixture; mix lightly. Spoon into 9-inch square baking dish sprayed with cooking spray; top with shredded cheese. Wrap tightly in plastic wrap. Freeze up to 3 months. Refrigerate overnight to thaw.
Heat oven to 350 degrees F.
Remove plastic wrap from baking dish; cover with foil.
Bake 1 hour or until heated through, uncovering after 45 min.