Zucchini and Caramelized-Onion Pizza

Preheat oven to 450 degrees, with a rack in lower third. Heat 2 tablespoonsoil in a skillet over medium-high. Add onions and garlic;cook, stirring frequently, until onions are soft and golden, about10 minutes. Meanwhile, brush a 13-by-18-inch rimmed bakingsheet with 2 tablespoons oil. Place dough on center of sheet and,using your hands, stretch and fit it to edges.

Toss zucchini with remaining 1 tablespoon oil; season with saltand pepper. Spread onion mixture evenly over dough, leaving a1/2-inch border. Top with zucchini; sprinkle with feta.

Bake until crust is golden brown and zucchini is tender, about25 minutes. Top with olives and mint; sprinkle with red-pepperflakes. Cut into pieces and serve.