1. Preheat oven to 450°.
2. Heat 1 teaspoon oil in a large nonstick skillet over medium-high heat. Add onion; sauté 6 minutes. Reduce heat to medium; cook an additional 15 minutes or until deep golden brown. Remove from heat.
3. Unroll dough onto a baking sheet coated with cooking spray. Pat dough into a 14 x 10-inch rectangle. Spread remaining 1 1/2 teaspoons oil over dough; sprinkle evenly with rosemary, pepper, and salt. Bake at 450° for 8 minutes.
4. Sprinkle onion and cheese evenly over crust. Bake an additional 5 minutes or until golden brown and cheese melts. Cool on a wire rack 2 minutes; cut into 8 equal pieces.
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