Trim off large leaves of broccoli. Remove tough ends of lower stalks, and wash broccoli thoroughly; cut flowerets and stems into thin slices. Combine broccoli, onion, and 1/4 cup water in a saucepan; cover and cook over medium heat 6 to 8 minutes. Drain thoroughly, pressing out moisture with paper towels. Combine next 8 ingredients. Stir in vegetables, and pour mixture into a greased 10-inch pie plate. Sprinkle with Parmesan cheese; bake at 350^ about 30 minutes or until set. Let stand 10 minutes. YIELD: One 10-inch pie.