CRUST – 18 sheets whole graham crackers, (2 sleeves) – 1/4 cup granulated sugar – 1/4 tsp salt – 6 Tbsp unsalted butter, melted CHEESECAKE – 16 ounces cream cheese – 1 cup ricotta cheese, whole fat or part skim – 1 cup confectioner's sugar – 4 Tbsp fresh lemon juice – 1/2 cup heavy cream TOPPING – 1 pint strawberries – 1/4 cup granulated sugar – 1/2 tsp cornstarch, dissolved in 1 teaspoon cold water – mint leaves , for garnish, optional