Cook the cauliflower pizza crust according to the packaging.
Heat oven to 400 degrees. Once crust has baked, add 1/4-1/2 cup pesto to start (add more as needed) to create a thin and even layer, spreading to the edges.
Top with several slices of mozzarella cheese before placing back into oven. Bake for 5-7 minutes or until cheese has melted.
On the side, toss arugula with a little olive oil and juice from 1/2 lemon. Remove any large fat pieces from sliced prosciutto and when pizza is baked, top with both! Enjoy warm or at room temperature.