Cut the dough in half. Then using a well-floured rolling pin, roll each piece of dough out into 12-inch circles. Place the dough circles on parchment paper. Lightly oil the tops and let them rest while the grill is heating.
Preheat the grill to high. If you have a grilling/baking stone, place it on the grill. Meanwhile prepare the pizza toppings.
One at a time, flip the dough circles onto the grill stone or grates. Grill for 2-3 minutes per side, flipping carefully with a large spatula.
One both pizza crusts are grilled, spread 8 ounces of hummus on each crust. Then top both with fresh arugula, tomatoes, olives, feta and drizzle with a little olive oil. Serve warm.