Cook the cheese tortellini according to package directions; drain and let cool slightly.
In a large serving bowl, combine the cooked tortellini, diced green pepper, halved grape tomatoes, halved pepperoni slices, drained sliced black olives, and shredded parmesan.
To make the balsamic dressing, add balsamic vinegar, Dijon or spicy brown mustard, diced shallot, crushed garlic, olive oil, Italian seasoning, salt, and ground pepper to a mason jar or dressing container.
Seal the jar and shake vigorously until the dressing is emulsified and well combined.
Pour desired amount of dressing over the salad and toss gently to combine; reserve any leftover dressing in the refrigerator.