Herb-Lemon Activation : Whisk together all marinade ingredients except the bay leaves. Taste a tiny drop; it should be bright and savory, not salty.
Chicken Coat & Chill : Reserve 2 Tbsp marinade in a small cup for basting (food-safe). Toss chicken with the remaining marinade and the crumpled bay leaves. Cover and marinate 30 minutes at room temperature (quick option) or 2–12 hours refrigerated.
Tzatziki Set : Stir yogurt, grated/squeezed cucumber, olive oil, lemon juice, garlic, dill/mint, and the optional pinch of salt with pepper. Chill 15 minutes to meld.
Skewer Line-Up : Thread chicken onto 8 skewers with slight gaps for even heat flow. Discard used marinade.
Sear & Sizzle : Preheat a well-oiled grill or ridged grill pan to medium-high (about 450–500°F). Grill skewers 8–10 minutes total, turning every 2–3 minutes. Brush once with the reserved clean marinade during the final minutes. Cook to 165°F in the center. Rest 3 minutes off heat.
Pita Warm-Up : Warm pitas directly on the grill or pan 15–30 seconds per side until pliable and lightly charred.
Wrap Assembly : Spread tzatziki inside each pita. Slide chicken off the skewers and into the pita. Add tomato, cucumber, a few onion slivers, and 2 olive halves. Finish with parsley or dill. Serve immediately.