Wash the cherry tomatoes. Slice them in half, and place in a large serving bowl.
In a small bowl or mason jar with a tight fitting lid, shake together the oiive oil, balsamic, garlic, mustard, Italian seasoning, and salt and pepper to taste until well combined.
Stir the dressing into the cherry tomatoes.
Top with parmesan cheese as desired.
Serve immediately or store in an airtight container in the refrigerator for up to 3 days.