Bring a large pot of water to a boil, and cook pasta according to package directions. Drain and set aside.
In the meanwhile, wash and dry all your veggies. Cut the tomatoes, bell pepper, and cucumber into small even cubes.
Place the veggies in a large bowl, then combine with the onion, lemon juice, olive oil, olives & feta, and seasoning. Mix well, then mix in the pasta.
Toss everything together, and add more oil if needed.
Serve immediately or for more flavor, cover the bowl, and refrigerate for at least 30 minutes. Enjoy!