Preheat oven to 350 degrees F. Line a 12-inch pizza pan with parchment paper; set aside. If you don’t have a pizza pan, you could also use a 9x13-inch baking dish.

In a mixing bowl or stand mixer, cream together light butter and sweetener. Add vanilla, egg and applesauce and mix until combined. Mix in cream of tartar, flour and protein powder until combined then spread in an even layer in prepared pan.

Bake for 12-15 minutes or until edges are barely golden brown. Remove from oven and let cool completely (place uncovered in the refrigerator to decrease cooling time).

In a large bowl, cream together softened Neufchâtel cheese, vanilla, protein powder and sweetener until smooth. Fold in Cool Whip then spread in an even layer over cooled crust.

Top with strawberries and blueberries. Cut into 12 equal pieces and serve.