1. For dressing, in a jar, combine vinegar, olive oil, salt, pepper, oregano, and garlic. Cover the jar and shake it well.
2. In a large mixing bowl, add corn, tomato, bell pepper, scallions, and parsley.
3. Pour dressing, and toss well.
4. Transfer salad to serving bowl, and serve immediately.
The recipe for dressing calls for 1 portion of acid and 3 portions of oil. You can also use lemon juice instead of vinegar.
You can prepare and keep dressing in refrigerator for 3 days.