Preheat your oven to 350, get a baking sheet lined with a Silpat, and set it aside.
Make your shortbread dough by getting your stand mixer, cream your vegan butter and sugars, mix in your vanilla and then mix in your flour until incorporated.
Take a Silpat and half of your dough. Take a large piece of saran wrap and cover the dough (for less sticking); roll your dough with the rolling pin rolling over the saran wrap (if that makes sense, you want a barrier for the sticking factor). Roll the dough to about ¼ to ½ inches thick. However thick you want them is how they will stay; they do not rise. You want it thick enough to handle the fruit topping. Use a biscuit cutter or a largemouth cup to cut circles in your dough. Transfer the dough circles to the prepared baking sheet via spatula. Repeat with the remaining dough. Bake for 8-10 minutes, watch them so they don't get too brown. Let them sit on the baking sheet for 5 minutes before moving to a cooling rack.
Make your frosting. Mix all the ingredients with your stand mixer. Stick this in the fridge while waiting for the cookies to cool.
Cut up your fruit into the desired shapes you want to use for your fruit pizza. Make sure all the fruit is super dry. Set aside.
Frost the fruit pizzas and top with the fruit. **Note if you aren't serving these right away, wait to put the fruit on them. After time the fruit will seep some liquid- they still taste amazing, if not even better- but they aren't so easy to handle, and the cookie can get very soft. This didn't phase us from gobbling them up. But if you're bringing to an event, I would put the fruit on when you get there. Store in the fridge.