Make crust: Preheat oven to 350°. Place oats, coconut and brown sugar in food processor bowl and grind to a fine consistency. Add egg white and water; pulse 3 or 4 times until just combined and moist. Press lightly into 10-inch springform pan coated with cooking spray. Make sure not to process too much or to press too firmly in pan or crust will shrink away from edges too much. Bake for 15 minutes. Remove from oven and let cool. Wrap outside of pan with heavy duty foil to prevent leaking, set aside. Reduce oven temperature to 325°.