Put the vegetable oil, vinegar, and spices in a bowl and stir to combine.
Flatten the chicken breasts to an even thickness and then place them in a gallon-sized ziptop bag. Pour the marinade over the chicken, seal the bag, and turn to coat. Place in the fridge to marinate for 30 minutes.
Preheat the grill to medium-high heat. Grease the grill grates before adding the chicken. Discard the remaining marinade. Cook the chicken for 12-15 minutes, turning it over halfway through cooking or until it reaches an internal temperature of 165˚F.
Video
Notes
Store leftovers in an airtight container in the fridge for 3-4 days or in the freezer for 1-2 months.Nutrition calculated using 1/4 of the marinade, since most of it is discarded.