Broccoli-Rice Quiche
["2 c. water", "1 (10 oz.) pkg. frozen chopped broccoli", "1/2 c. chopped onion", "3 c. cooked long-grain rice, cooked without salt or fat", "1 1/2 c. (6 oz.) shredded reduced-fat sharp Cheddar cheese, divided", "1 1/2 c. frozen egg substitute, thawed and divided", "3/4 tsp. salt, divided", "vegetable cooking spray", "1/2 tsp. pepper", "1/2 c. skim milk", "2 (2 1/2 oz.) jars sliced mushrooms, drained"]
["Bring water to a boil in a medium saucepan. Add broccoli and onion; cover. Reduce heat and simmer 8 to 10 minutes or until vegetables are tender. Drain well and set aside."]
["water", "broccoli", "onion", "rice", "Cheddar cheese", "frozen egg substitute", "salt", "vegetable cooking spray", "pepper", "milk", "mushrooms"]