In a large skillet, saute the zucchini, onion, mushrooms and green pepper in butter until tender. Stir in the flour, baking powder and salt until blended. , In a large bowl, combine eggs and cottage cheese. Stir in vegetables and Monterey Jack cheese., Transfer to a greased 2-1/2-qt. baking dish. Bake, uncovered, at 350° for 35-45 minutes or until a thermometer reads 160°.