Cook chicken, I season with salt, pepper, and garlic powder. Let cool and dice into bite size chunks.
While chicken is cooking bring water to a boil and cook orzo. When time is up drain and rinse with cool water to cool it down. Let drain again, you don't want it to have too much water on it when you add it to the salad.
In a bowl add chopped tomatoes, diced onion, feta, garlic, vinegar, oil, parsley, salt and pepper, orzo, and chicken. Mix to combine.
Taste for seasoning.
When I make this I generally don't measure my ingredients, so it may need more vinegar and oil, I like mine tart and you don't want it dry and the pasta will soak up a lot of this! After you taste for seasoning refrigerate for at least an hour to let all the flavors come together.