Combine tomatoes, bell pepper, scallions, garlic and oil in a large bowl; toss to mix well. Add feta cheese, olives, parsley, basil, balsamic vinegar, wine vinegar and lemon juice; toss again. Season with salt and pepper.
Put a large pot of lightly salted water on to boil. Shortly before serving, cook pasta according to package directions. Drain and add to the sauce; toss to coat well.