Prepare the Barilla® Penne Pasta as directed on the box. Cook in lightly salted boiling water, uncovered, until tender, but still firm to bite. About 9-11 minutes Drain pasta and rinse with cold water in a colander and set aside in the sink and let drip completely.
In a medium bowl, mix red wine vinegar, horseradish, lemon juice, garlic, oregano, and olive oil. Set aside for later.
In a large bowl, combine the pasta, tomatoes, onion, red and green peppers, olives, cucumbers, and feta cheese. Pour the vinegar mixture over pasta blend and stir until coated
Refrigerate and chill for at least 3 hours before serving.