"Preheat oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.",

"Prepare the strawberry cake mix according to package instructions and divide batter between the two pans. Bake and let cool completely.",

"For the cheesecake layer: In a bowl, beat cream cheese, sugar, eggs, and vanilla until smooth. Pour into a greased 9-inch round pan and bake at 325°F (160°C) for 40–45 minutes. Cool completely and refrigerate.",

"To assemble: Place one strawberry cake layer on a serving plate. Spread half the jam on top. Add the cheesecake layer and spread remaining jam. Top with second cake layer.",

"Garnish with fresh strawberries if desired. Chill before slicing and serving."