Start by preheating your oven to 350°F (175°C). In a large mixing bowl, cream together the softened butter and granulated sugar until it's light and fluffy. This step takes about 2-3 minutes. Then, add in the egg, vanilla, and almond extracts. Mix until fully incorporated.

In a separate bowl, whisk together the flour, baking powder, salt, and lemon zest. Gradually mix the dry ingredients into the wet ingredients. The dough will be somewhat stiff but manageable, and you should mix until you see no streaks of flour.

Once done, spread the dough into a greased or parchment-lined pizza pan. Use your hands or a spatula to press the dough evenly into the pan, making sure it’s well-distributed. Try to get the thickness as uniform as possible.

Place the pan in the preheated oven and bake for 12-15 minutes, or until the edges are lightly golden. Keep an eye on it; the center should feel soft but set. When done, remove from the oven and allow it to cool completely in the pan.

While the cookie base cools, prepare the cream cheese frosting. In a mixing bowl, beat the softened butter and cream cheese together until smooth. Slowly add in the powdered sugar, salt, and vanilla extract, mixing until creamy. If your frosting is too thick, add the heavy cream to achieve the texture you desire.

Once the cookie base is cool, spread an even layer of frosting over the top. Now comes the fun part: arranging your fruit! Place the blueberries, strawberries, and raspberries on top of the frosted cookie, as lavishly as your heart desires.

For the best results, chill the assembled fruit pizza in the refrigerator for about 30 minutes. This allows everything to set perfectly, enhancing the flavors and making it easier to slice.