Preheat the oven to 400 degrees F. Toss the butternut cubes with the olive oil, 1 tbsp maple syrup, and a pinch of salt. Roast the cubes in the oven for 10-15 minutes until they are fork tender and caramelized.
Sprinkle the mozzarella and asiago cheese onto your pre baked pizza crust, then add the red onion, rosemary leaves (just pull them off the sprig with your fingers), and butternut squash cubes. Drizzle the other 1 tbsp maple syrup over the top of the pizza, then season with a pinch of salt and pepper. Bake the pizza for 10-15 minutes until the crust is golden. Sprinkle on the arugula leaves while the pizza is hot to wilt them slightly, then cut the pizza into slices and enjoy!