To prepare the crusts:

1. Preheat the oven to 325 degrees and line an 8” or 9” square pan with aluminum foil extending up the sides of the pan. Cream the butter in a medium-sized mixing bowl until smooth, about 1-2 minutes. Add the vanilla, lemon zest, and confectioner’s sugar and stir on low until combined. Stir the flour, cornstarch, and salt until combined. Pat the mixture into a flat layer in the bottom of the pan (using wet fingers, if needed) and use a fork to poke a few holes into the bottom. Bake in the preheated oven about 30 minutes or until the shortbread has barely begun to start browning on the top. Set aside to cool while you prep your ganache.

To prepare the filling:

1. Pour the white chocolate chips in a microwave and heat-safe bowl. Combine the strawberries and heavy cream in a heavy bottomed pan over medium-low heat. Use a potato masher to crush the strawberries and release their juices as your slowly heat the mixture. Once mashed and the mixture has barely begun to bubble, remove from heat and use a fine mesh sieve to strain the mixture into the bowl of the white chocolate chips. Use a rubber spatula to smoosh any remaining juice or cream into the bowl but keep the strawberries seeds out (unless you’re into that kind of thing!) Use a whisk to stir the mixture and melt the white chocolate chips. If they don’t melt down completely, put the bowl into the microwave for 10 second increments to melt. Keep stirring and microwaving until all of the chocolate has melted. Pour the mixture into the pan and place in the fridge to allow to set up until completely firm. Some bubbles may pop up in the first few minutes and you can use a toothpick to pop those if you want. Once set, use a sharp chef’s knife to cut out small squares and enjoy!