To freeze: Assemble and then wrap in plastic wrap. Top with foil for extra protection. Thaw before cooking. Remove plastic wrap and re-cover with foil. Cook at 375 degrees for 45 minutes, covered with foil. Then, remove the foil and cook for another 5-10 minutes.
If you forget to thaw it, just cook covered for 1 hour and 20 minutes. Then, uncovered for an additional 10 minutes.