Preheat oven to 500°.
Heat 2 teaspoons olive oil in a large nonstick skillet over medium-high heat. Add black pepper, minced garlic, and mushrooms; sauté for 5 minutes or until mushrooms are tender and most of liquid evaporates.
Spread sauce over the pizza crust, leaving a 1/2-inch border, and top with mushroom mixture. Sprinkle evenly with mozzarella, fontina, and Parmesan cheeses. Top with roasted red bell peppers, 1 tablespoon capers, and artichokes. Bake at 500° for 10 minutes or until cheese melts and begins to brown. Let pizza stand for 5 minutes before serving.