PREPARE jelly powder according to 30 minute Set Method on package. Set aside 2/3 cup (150 mL) of slightly thickened jelly. Stir fruit into remaining jelly; spoon into 4 dessert dishes.
BEAT reserved jelly with electric mixer until fluffy and double in volume. Spoon over fruited layer in dishes. Chill until set, about 30 minutes. Garnish with additional fruit, if desired.