Prepare the balsamic marinade by combining the balsamic vinegar, maple syrup, spices, garlic and dijon and whisking together until smooth. Set aside
Butterfly each chicken breast (slice it open) then cut it in half to create 4 even sized pieces. You'll want the chicken about 1/2u0022 thick to make sure it cooks evenly. If your chicken has the tenderloin attached I suggest separating that too
Season both sides of the chicken with salt, pepper and Italian seasoning, then rub with olive oil
Heat a skillet on medium heat then drizzle in about 2 tbsp olive oil. Grill the chicken in the heated oil for about 4 minutes per side, until browned.
Lower the heat, then pour in the balsamic sauce. Cook for another 6-8 minutes, until the sauce has thickened. Spoon the sauce over the chicken every couple of minutes. Thicker chicken pieces will need more cook time, make sure your chicken is cooked to 165 F.
Top with extra Italian seasoning or fresh basil when serving