Preheat oven to 375°.
To prepare crust, combine rice, garlic powder, onion powder, 1/2 teaspoon salt, and 1 egg. Spread mixture into the bottom and up sides of a 9-inch pie plate coated with cooking spray. Sprinkle bottom of crust evenly with 1/4 cup shredded cheddar cheese.
To prepare filling, heat a medium nonstick skillet over medium-high heat. Coat pan with cooking spray. Add onion and the next 4 ingredients (through sausage); sauté 5 minutes. Spoon mixture evenly into prepared rice crust. Combine the egg substitute, fat-free yogurt, salt, hot pepper sauce, and egg whites; stir with a whisk until well blended. Pour egg substitute mixture over sausage mixture. Sprinkle with 1/4 cup shredded cheddar cheese. Bake at 375° for 30 minutes or until the center is set. Let stand 5 minutes before serving.