Preheat your oven to 350°F.
In a mixing bowl, add softened butter, sugar, egg white, and lemon extract. Beat with a hand mixer until combined. Then, add in almond flour and mix for another 10-15 seconds. At this point, your batter should be crumbly, but will firmly stick together when pressed with your fingers.
Then, heavily grease or line parchment paper along an 11x7 pan. Dump the dough into your greased pan and press firmly until the bottom of the pan is evenly covered.
Bake for 15-18 minutes or until the crust is golden brown. NOTE: All almond flours and ovens will cook slightly different. Keep an eye on your shortbread crust after 12 minutes in the oven to avoid burning.
While the shortbread crust is cooking, put butter, powdered sugar, lemon extract and cream cheese in a mixing bowl. Mix on medium-high until frosting-like consistency is reached.
Wash all fruit and let completely dry. We do not want excess water from the fruit on the frosting or shortbread crust.
Once the shortbread crust is done baking, let it cool completely. Stick in the fridge or freezer to speed this up a bit. Then, once cooled, spread an even layer of frosting across entire crust.
Top with fresh fruit, slice and enjoy!