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To freeze: Prepare recipe as directed above, and place in aluminum foil-lined dish. Cover tightly and freeze.
To defrost and reheat: For conventional oven, thaw casserole in refrigerator; cover and reheat at 350 degrees F for 45 minutes or until thoroughly heated.
For microwave oven, cover casserole tightly with heavy-duty plastic wrap; fold back a small corner of wrap to allow steam to escape. Defrost at MEDIUM LOW (30% power) for 20 to 25 minutes, giving dish a half-turn after 10 minutes. Microwave at MEDIUM HIGH (70% power) for 10 minutes or until bubbly, giving dish a half-turn after 5 minutes.