In a large mixing bowl, whisk together all ingredients except the olive oil. Place the mixing bowl on top of a damp dish towel to keep it steady. While whisking continuously, slowly drizzle in the olive oil until smooth. Set aside.
¼ cup red wine vinegar, 2 cloves garlic, 1 tablespoon dijon mustard, ½ teaspoon honey, ½ teaspoon Italian seasoning, ½ teaspoon kosher salt, ¼ teaspoon black pepper, ½ cup extra virgin olive oil
Cut the chicken breast lengthwise into equal-sized pieces, trimming and discarding any excess fat. Lay a piece of plastic wrap over the chicken breasts and pound them into an even, ½-inch thickness.
2 pounds boneless, skinless chicken breast
Add the chicken breast to the bowl of marinade and toss until evenly coated. Cover the bowl with beeswax wrap or plastic wrap and refrigerate for at least 2 hours or up to 2 days. You can turn the chicken breast every few hours for more even marinade coverage.
Remove the marinated chicken breasts from the refrigerator about 30 minutes prior to cooking to bring them closer to room temperature. Preheat your grill on high heat for 15 minutes.
Reduce the heat to medium-high. Remove the chicken breast from the marinade, allowing the excess marinade to drip back into the bowl. Place the chicken breasts on the grill and close the lid. Cook chicken for about 4-5 minutes per side. The chicken is done when it reaches an internal temperature of 165℉.
Transfer the chicken breasts to a plate and allow them to rest for 10 minutes before serving.