Place chicken breast between two sheets of parchment paper and use a heavy rolling pin or meat mallet to pound chicken to an even thickness.
Combine the olive oil, red wine vinegar, Tastefully Simple® Italian Garlic Seasoning, lemon juice, salt, red pepper and black pepper in a large bowl or zip-close bag and mix to combine. Add chicken breast to marinade and turn to coat evenly.
Cover chicken or zip bag. Place in fridge and let marinate for 30 minutes, up to 12 hours.
Heat grill to 375° F. Brush grill grates with oil if needed. Remove chicken from marinade and grill on each side for 5 to 7 minutes, until chicken reaches 165° F. Discard leftover marinade.
Remove chicken from grill and let rest under a sheet of foil for 5 minutes before slicing. Enjoy!