Combine egg whites and brown sugar in a small bowl, stirring well. Stir in cereal and coconut; fluff with a fork until thoroughly coated. Lightly press cereal mixture in bottom and 1/2 inch up sides of a 10- inch springform pan coated with cooking spray.
Bake at 350° for 15 minutes or until edges begin to brown. Cool completely.
Remove sides of pan, and place crust on a serving plate. Arrange kiwifruit around outer edge of crust. Place fruit spread in a large bowl; stir until smooth. Add nectarines and strawberries; stir gently until fruit is thoroughly coated. Mound fruit in center of tart, and arrange attractively. Cut tart into wedges, and serve immediately.