Grease 8 x 8 x 2 inch baking dish and spread broccoli in dish. Beat sour cream, cottage cheese, Bisquick, margarine and eggs with hand beater for 1 minute. Pour over broccoli. Arrange tomato slices on top; then sprinkle with Parmesan cheese. Bake until golden brown and when a knife is inserted halfway between center and edge comes out clean.
