Preheat oven to 375° F.
Using a pastry brush, generously brush the pizza crusts with the garlic oil.
Layer the onion over the crust, equally divide the onion between the crusts.
Divide the brussel sprouts between the crusts, arranging them strategically between the onion.
Sprinkle 1 teaspoon of the herbs over each crust.
Equally divide the mozzarella cheese and sprinkle over each pizza.
Sprinkle the remaining herbs over the cheese.
Equally divide the parmesan cheese and sprinkle over each pizza.
Bake for 10 – 15 minutes, or until the cheese is melted and bubbly.