Soften gelatin in 1/4 cup cold water. Dissolve in 1/2 cup boiling water. Stir in lemonade concentrate and strawberries (with juice). Chill until partially set.
Fold in whipped cream. Pour into 6 individual molds. Chill until firm. Unmold and garnish with additional whipped cream and mint leaves if desired. Makes 6 servings.