To Make The Mediterranean Pasta Salad:Cook the pasta al dente in a large stockpot of generously-salted water according to package instructions. Drain pasta, then rinse under cold water for about 20-30 seconds until no longer hot. Transfer the pasta to a large mixing bowl.Add cucumber, tomatoes, kalamata olives, feta cheese, and red onion to the mixing bowl, then drizzle all of the vinaigrette evenly on top. Toss until all of the ingredients are evenly coated with the dressing.Serve immediately, garnished with extra feta and black pepper if desired.To Make The Lemon-Herb Vinaigrette:Whisk all ingredients together until combined.