In medium bowl, combine olives, tomatoes, tuna, cucumber, onion, garlic, olive oil, salt and pepper. Stir well and chill in refrigerator for 2 hours.
Bring a large pot of lightly salted water to a boil. Add pasta and cook for 8 to 10 minutes or until al dente; drain and rinse with cold water until cool. Toss with tomato mixture, and serve.
