Chicken Gyros from favfamilyrecipes.com

I didn't have any balsamic vinaigrette salad dressing so I just used sesame ginger salad dressing (ok different taste but still yummy). The cucumber sauce was the best I have ever tasted.  I just cut up the chicken before I marinated and then just grilled it in a skilled on the stove.

Marinade:
3/4 c. balsamic vinaigrette salad dressing
3 Tbsp. fresh squeezed lemon juice (about 1/2 of a lemon)
1 Tbsp. dried oregano
1/2 tsp. freshly ground black pepper

4 boneless, skinless chicken breast halves

Tzatziki Sauce (cucumber sauce):
1/2 c. seeded, shredded cucumber
1 tsp. kosher salt
1 c. plain yogurt
1/4 c. sour cream
1 Tbsp. lemon juice
1/2 Tbsp. rice vinegar
1 tsp olive oil
1 clove garlic, minced
1 Tbsp. chopped fresh dill
1/2 tsp. Montreal seasoning (we just used the Montreal seasoning for chicken)
kosher salt to taste
pepper to taste

4 slices of soft flatbread (or pitas if you prefer)

Toppings:
heart of romaine lettuce, cut into slices
red onion, thinly sliced
tomatoes, sliced
kalamata olives
banana peppers (pepperoncinis), sliced 
crumbled feta cheese

In a small bowl mix all marinade ingredients. Cut up chicken into cubes (for skewering) and place in a large resealable plastic bag. Pour marinade over the chicken, seal, and refrigerate for at least 1 hour.

In the meantime, combine cucumber and kosher salt and let sit for a few minutes. In a medium bowl, mix the yogurt, sour cream, 1 tablespoon lemon juice, rice vinegar, and olive oil. Season with garlic, fresh dill, and Montreal seasoning. Squeeze the cucumber to remove any excess water; stir into sauce. Season to taste with kosher salt and pepper. Refrigerate until ready to use.

Skewer chicken (remember to soak your skewers if they are wooden) and place on grill over medium-high heat, turning 1/4 turn every couple minutes. When chicken is cooked through and juices run clear, remove from heat.

Place flatbread on the grill, and cook for about 90 seconds, until warm, turning frequently to avoid burning. Arrange chicken (removed from the skewers of course), lettuce, onion, tomato, olives, and banana peppers on the flatbread. Top with tzatziki sauce and feta cheese.