Coat a 12-inch perforated pizza pan with cooking spray. Heat grill to 500°F.
Place dough on a lightly floured surface; roll into a 12-inch circle. Transfer dough to prepared pan, shaking off excess flour. Brush dough evenly with oil.
Spread pizza sauce evenly over dough, leaving a 1/4-inch border. Sprinkle with parmesan; top evenly with spinach and garlic. Sprinkle mozzarella over spinach. Spoon teaspoonfuls of ricotta over mozzarella.
Bake in the oven or on a grill at 500° until mozzarella melts and crust browns. Top with tomato slices. Cut into 6 wedges.