Place the chicken breasts in a Ziploc bag. Add in 1 Tbsp oil, garlic, Italian seasoning, 1 tsp sea salt and 1/4 tsp pepper.
Close the bag and mix thoroughly. Refrigerate for at least 1 hour (overnight is best if time allows).
In a small bowl, combine diced onion, tomatoes, basil and 1 Tbsp extra virgin olive
oil.
Add sea salt and pepper to your taste. Toss well to combine then cover and set aside.
Take the chicken out of the fridge and let it sit for about 15 minutes to reach room temp.
Preheat a grill pan or outdoor grill to med-high.
Grill the chicken 2-3 minutes on each side, or until cooked through and tender.
Sprinkle with fresh grated Parmesan.
Set aside on a platter and top with bruschetta-tomato mixture and enjoy!