Strawberry Bavarian Dessert
["2 c. sweetened sliced fresh strawberries or 2 (10 oz.) pkg. frozen", "2 envelopes Knox unflavored gelatine", "1/2 c. cold water", "2 Tbsp. lemon juice", "1/4 tsp. salt", "2 c. heavy cream, whipped", "about 5 (1-inch) slices jelly roll"]
["If using frozen berries, thaw and let warm to room temperature."]
["fresh strawberries", "unflavored gelatine", "cold water", "lemon juice", "salt", "heavy cream", "roll"]