Cook rice according to directions. Combine rice, cheese, slightly beaten eggs and salt. Press mixture firmly into greased dish. Set aside. Defrost broccoli in package. Microwave 4 minutes on High. Place broccoli in 1 1/2 quart casserole; add onions to broccoli. Microwave 6 to 8 minutes on High. Let stand 3 minutes covered. Drain broccoli. Beat remaining egg slightly. Stir in milk, pepper, mushrooms and remaining salt; add to broccoli and mix well. Spoon into rice quiche shell. Microwave 8 to 10 minutes. Sprinkle with remaining cheese. Microwave 20 seconds on High, if necessary, to melt cheese. Makes 6 servings. (Use 10-inch quiche dish.)