Preheat oven to 425°. Heat oil in a large nonstick skillet over medium-high heat. Add spinach; sauté 3 minutes or until lightly wilted. Place pizza crust on a baking sheet. Spread sauce over pizza crust, leaving a 1/2-inch border; top with baby spinach, feta cheese, pepper, and olives. Bake at 425° for 15 minutes or until thoroughly heated.