1. Combine all ingredients, except buttered crumbs, in a 2-quart mixing bowl. Blend thoroughly. Pour mixture into a well-buttered microwavesafe 6-to 8-cup ring mold. Cover with wax paper.
2. Microwave at Cook Cycle 1 (power level 7) for 11 1/2 to 13 1/2 minutes, or until mold is set. Let stand, covered, 5 minutes. Turn out onto serving platter. Sprinkle, if desired, with buttered crumbs, and fill with scrambled eggs or a creamed food.