Your Labor Day barbecue just got a little more patriotic with this RITZ cracker cake! Combine blueberries, raspberries, and strawberries in a bowl. Add sugar, lemon juice, and zest, mixing lightly. Beat cream cheese and sugar until blended, adding ricotta, lemon zest, and juice as you go. Layer everything in a circular pie plate and top with the berries just before serving. Dessert time!