Preheat oven to 450°.
Heat olive oil in a large nonstick skillet over medium-high heat. Add onion; cover and cook for 3 minutes. Uncover and cook for 11 minutes or until golden brown, stirring frequently.
Place the pizza crust on a baking sheet. Combine the sauce and tomatoes. Spread sauce mixture over pizza crust. Top with onion and cheese. Bake at 450° for 10 minutes or until crust is golden brown. Sprinkle with basil. Cut into 6 wedges.