Bring lightly salted water to a rolling boil. Add the penne and then return to a boil. Cook the pasta uncovered, stirring occasionally, for about 11 minutes. Rinse and drain the penne.
Make the vinaigrette by combining the vinegar, lemon juice, garlic, oregano, salt, pepper, and olive oil together in a small bowl.
Combine pasta, tomatoes, green and red peppers, cucumber, olives, and feta cheese in a large bowl. Pour the vinaigrette over the pasta, vegetables, and cheese, and mix together. Cover and refrigerate for at least 1 hour before serving.
Notes
To STORE Greek Pasta Salad leftovers, place them in an airtight container and refrigerate. It will stay fresh for up to 3-5 days. This salad is best served cold.However, if you prefer it warm, gently heat it in a skillet over low heat for a few minutes, stirring occasionally. Always stir well before serving to redistribute the dressing.