Blackberry Mousse
["1 lb. frozen blackberries", "1 c. sugar", "2 Tbsp. fresh lemon juice", "2 Tbsp. water", "1 envelope unflavored gelatin", "1 c. heavy cream, whipped", "4 large egg whites, beaten until stiff but not dry"]
["Combine berries, sugar and lemon juice.", "Bring to a boil over medium heat.", "Remove from heat and allow to cool.", "Puree and set aside.", "Put the water in a small saucer and sprinkle the gelatin over it. Set aside for a few minutes.", "Stir the softened gelatin into the berry puree.", "Fold in the whipped cream.", "Fold in the beaten egg whites.", "Place in goblets or in a souffle dish and refrigerate for at least an hour before serving."]
["frozen blackberries", "sugar", "lemon juice", "water", "unflavored gelatin", "heavy cream", "egg whites"]