Preheat oven to 400. Prepare crust of choice. Place crust on a pizza stone or prepared baking sheet with parchment paper. Pre-bake crust until crispy
On a cutting board, slice the onions into thin strips. Add to a frying pan with olive oil or butter and let cook slowly on medium heat until caramelized.
On a cutting board, slice the zucchini into thin ribbons. The zucchini ribbons should be so thin you can almost see through it. This way you can allow the zucchini to bake while the pizza is baking and not have to go through the extra step of cooking to zucchini separately.
Remove crust from oven and top with cut brie slices, ricotta, onions and zucchini slices.
Add crust back to oven and bake until cheese is melted and golden brown. Cook time will vary depending on the crust you choose.
Remove from oven. Top with arugula and drizzle with balsamic glaze. Slice into 4 or 6 pieces and serve.