Cinnamon Toast Crunch Cheesecake

Name: Cinnamon Toast Crunch Cheesecake
Ingredients: 1 1/4 cups milk; 8 cups Cinnamon Toast Crunch® cereal (about 14 ounces), plus more for serving; 12 tablespoons (1 1/2 sticks) unsalted butter, melted; 3/4 cup packed dark brown sugar; One 1/4-ounce package unflavored powdered gelatin; 1 tablespoon ground cinnamon; Three 8-ounce packages cream cheese, at room temperature; 1 1/2 cups confectioners' sugar; 1/2 cup sour cream; 1 tablespoon pure vanilla extract; Pinch fine salt; Juice of 1/2 lemon; Whipped cream, for serving