To make ahead: Prepare as above through Step 2. Cover and refrigerate for 2 hours or up to 24 hours. Bake, covered, in a 325 degrees F oven for 40 minutes. Sprinkle with cheese and bake, uncovered, for 10 to 15 minutes more or until a knife inserted near the center comes out clean. Let stand 10 minutes before serving.
1 1/2 medium-fat protein, 1 1/2 starch, 1/2 vegetable