Bring a large pot of salted water to a boil and cook the pasta according to package instructions. (When you drain the pasta, rinse with cold water to cool.)
Combine the mayo, balsamic vinegar, garlic, salt and pepper in the bottom of a large bowl to make the pasta salad dressing.
Add the cooled pasta to the dressing along with the other pasta salad ingredients. Mix well to combine.
Top with the breadcrumbs right before serving. (This keeps them crispier for longer - although I did find that my breadcrumbs stayed crispy after mixed into the pasta for several hours!!)
