Place all of the marinade ingredients in a blender. Pulse for 20 to 30 seconds.
CHICKEN:
Rinse the chicken breasts and pat dry with paper towel.
Butterfly the chicken breasts. (Use a sharp knife and starting at the thinner part of the breast, cut through to the thick end of the breast - don't cut all the way through. Use your hand to spread the chicken breast flat.)
Place the chicken breasts in a large bowl or a large zip lock bag. Coat the chicken well. Allow to marinate in the refrigerator for at least two hours.
Remove the chicken from the refrigerator at least 30 minutes before baking.Preheat the oven to 400 degrees.
Line a sheet pan with parchment paper. Shake off excess marinade from the chicken and place the breasts on the parchment paper. Drizzle the chicken with olive oil.
Bake the breasts for 40 minutes; use a thong to flip the breasts over half-way through the cooking time.
Plate and serve with your favorite side dish.Note: I also serve this with my Roasted Salsa Verde Sauce (recipe included)