Marinate the chicken. Add the chicken to a glass container and add in the garlic oil, lemon juice, salt and Italian seasoning. Mix well to make sure all the chicken is coated with the marinade. Let sit for a t least 1 hour or up to overnight. Grill for about 5 minutes a side (depending how how thick they are) or bake at 375° for 15-18 minutes.
While the chicken is cooking, make the bruschetta. Or this can be made a day or two in advance if wanted. Combine the tomatoes, green onion, salt, garlic oil, balsamic vinegar and fresh basil in a medium bowl and stir well.
Once chicken is done cooking, scoop bruschetta on top and serve.