In a large skillet, cook zucchini in 1 tablespoon oil 5-6 minutes or until tender; drain and set aside. In the same skillet, saute the onion and garlic in remaining oil for 1 minute. Add the tomatoes, basil, oregano, garlic salt and pepper; simmer, uncovered, for 10 minutes. Remove from the heat; gently stir in zucchini.