Step 1

Preheat oven to 425°F. In a large skillet cook onion in 1 tablespoon hot oil over medium heat for 10 minutes until softened, stirring occasionally. Set aside.

Step 2

In a small bowl combine remaining 3 tablespoons oil and crushed red pepper; drizzle some of the oil mixture onto the pizza crusts. Place crusts on a very large baking sheet(s). Top with chicken, onion, and cheese.

Step 3

Bake for 10 minutes or until cheese is melted and pizzas are heated through.

Step 4

Top pizzas with arugula, drizzle any remaining oil, and sprinkle or pass additional crushed red pepper.