Heat your grill to medium heat. While it is preheating, prepare the chicken marinade. Combine all ingredients into a large bowl and mix well to ensure everything is evenly coated.
Lay the chicken pieces on the grill and close the lid. Grill for 8 minutes on each side or until no longer pink.
While the chicken is cooking, prepare the salad. Combine the mixed greens to the mint and lay the lemon wedges on the side (for drizzling at the end).
Next, prepare the Tzatziki sauce. Combine the mayo to the mint in a small bowl. Assemble your salad with the greens as the base. Then add the chicken and top with the Tzatziki sauce.