Pre-heat the oven to 350°F. Grease and line two 9-inch cake pans with parchment paper.

Combine the cake mix, instant pudding mix, eggs, water and melted butter in a large mixing bowl. Beat with an electric mixer until well combined. Pour the batter into the prepared cake pans and bake at 350ºF for 30 minutes. Cool the cakes in the pans on a wire rack for 10 minutes. Then, remove the cakes from the pans and let them cool completely.

While the cakes are baking, make the lemon cream. Beat the lemon curd and mascarpone cheese together in a bowl until smooth. In a separate bowl, beat the heavy cream with an electric mixer. When it starts to thicken, add the sugar and beat until stiff peaks form. Fold the whipped cream and lemon zest into the lemon mascarpone mixture and chill until ready to use.

Trim the cake layers to make them flat on top by slicing off the domed top of each layers. Place one cake layer cut side down, on a platter or cake stand. Spread 1 cup of the lemon mascarpone cream on top of the cake layer. Top the cream with the sliced strawberries. Place the cut side of the second cake layer on top of the strawberries. Spread the remaining lemon mascarpone cream on top and spread it down the sides of cake, making a decorative pattern. Garnish the top of the cake with whole strawberries and lemon slices. Chill well before serving.