Start by bringing a large pot of water to a boil. Cook the pasta according to the package instructions until al dente. Once done, drain the pasta and rinse it well with cold water to stop the cooking process.
In a large mixing bowl, combine the extra virgin olive oil, lemon juice, red wine vinegar, Dijon mustard, garlic, oregano, salt, and pepper. Whisk everything together with a fork until it’s well mixed and emulsified.
Add the sliced cherry tomatoes, cucumbers, diced red bell pepper, red onion, and both black and green olives to the bowl with the dressing. Mix everything until the veggies are coated, and let them marinate while the pasta cools down. This allows the flavors to meld beautifully.
Once the pasta is cooled and drained, add it to the bowl with the marinated veggies. Toss everything together gently and fold in the crumbled feta cheese. Season with additional salt and pepper to taste, along with more lemon juice if desired.