Preheat oven to 425°F. Coat 9-inch springform pan with nonstick cooking spray; set aside.
Combine cornflakes, coconut, and egg whites in medium bowl; toss gently until blended. Place mixture in prepared pan; press firmly to cover bottom and 1/2 inch up side of pan. Bake 8 minutes or until edge begins to brown. Cool completely on wire rack.
Drain pineapple, reserving juice in small saucepan. Stir pineapple juice into cornstarch until smooth. Bring to a boil over high heat. Boil 1 minute, stirring constantly. Remove from heat; cool completely. Stir in sugar substitute and coconut extract, if desired.
Combine pineapple, mango slices, and banana slices in medium bowl. Spoon over baked crust; drizzle with pineapple juice mixture. Cover with plastic wrap; refrigerate 2 hours. Cut into 8 wedges.
Note: The crust can be made 24 hours in advance, if desired.
Calories: 139 calories, Carbohydrates: 25 g, Protein: 2 g, Fat: 4 g, Saturated Fat: 4 g, Cholesterol: 0 mg, Sodium: 59 mg, Fiber: 2 g
Exchanges per serving: 1 Bread/Starch, 1/2 Fat, 1/2 Fruit.
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