In a large bowl, whisk together all ingredients except chicken.
Once mixed add in cited chicken. Cover and refrigerate for 30-45 minutes.
Heat grill to medium-high heat.
Thread chicken onto metal or wooden skewers. Be sure to soak wooden skewers for 30 minutes.
Oil the grates of the grill or grill pa ad place skewers on them.
Grill the chicken for 3-4 minutes then flip to over and frill the other side for 3-4 minutes or until chicken is cooked thoroughly.
Once chicken is cooked, dice romaine lettuce.
Cut english cucumber, take out seeds and dice.
In a bowl layer, salad, cucumber, tomato, feta.
Top with 3-4 ounces of cubed chicken and OPA Taziki Ranch dressing.