Preheat oven to 325o and line an 8x8 inch pan with parchment paper.
In a bowl, whisk together almond flour, salt, and baking powder. In a separate bowl, beat butter and Truvia until creamy. Beat in the egg and vanilla, then the almond flour mixture until the dough comes together.
Press dough firmly into pan and smooth the top with a flat bottomed glass. Bake 30 minutes, until just golden brown around the edges and slightly firm to the touch. Remove and let cool.
For the Icing:
While the cookie crust is baking, whip the cream cheese, sweetener, and lemon zest together for 2-3 minutes on high until smooth.
In a separate bowl, whip the heavy cream until stiff peaks form.
Fold the whipped cream into the cream cheese mixture and mix well. Cover and let chill in the refrigerator.
Once cookie crust is cool, spread the icing over the entire crust and decorate with any variety of sliced fruit.