In a large sauté pan, heat the 1 1/2 tablespoons olive oil. Add garlic and sauté for 3-4 minutes.
Add zucchini and continue to sauté until the zucchini begins to brown (about 5 minutes). If needed, add more olive oil, then balsamic vinegar, tomatoes, salt, pepper, and parsley.
Cover and cook for 15 minutes. When ready to serve drizzle remaining olive oil.