Cook the Pasta. Bring a large pot of salted water to a boil. Cook your pasta until al dente according to the package instructions. Drain and rinse under cold water to stop cooking and cool it down quickly.
Make the Dressing. In a small bowl or jar, whisk together olive oil, red wine vinegar, lemon juice, minced garlic, oregano, salt, and pepper. Set aside.
Prep the Veggies. While the pasta cooks, chop the cucumbers, tomatoes, bell pepper, red onion, and parsley.
Combine. In a large mixing bowl, toss the cooled pasta with chopped vegetables, olives, and feta. Pour the dressing over the top and toss until everything is evenly coated.
Chill. Refrigerate for at least 30 minutes before serving to allow flavors to meld.
Serve. Toss again, adjust seasoning if needed, and serve cold. Garnish with additional parsley, lemon wedges, or a sprinkle of feta.