To Serve 12:
Double ingredients above. Using a 13x9x2-inch baking dish, assemble recipe as directed. Bake, covered, for 30 minutes. Uncover; bake 35 minutes more, or until a knife inserted near center comes out clean. Sprinkle with cheese. Let stand 10 minutes.
Prepare as above through Step 3. Cover; refrigerate for up to 48 hours. Bake and serve as above.