In a bowl, combine chicken thighs with olive oil, garlic, oregano, lemon juice, salt, and pepper. Marinate for at least 30 minutes.
Grill the chicken over medium-high heat until cooked through, about 5-7 minutes per side.
For the tzatziki, mix together Greek yogurt, grated cucumber, garlic, olive oil, dill, salt, and pepper. Chill until ready to use.
Warm the pita bread. Slice the cooked chicken into strips.
Assemble the gyros: Spread tzatziki on the pita, add chicken, and top with onion, tomato, and cucumber slices.
Prep Time: 45 minutes | Cooking Time: 15 minutes | Total Time: 1 hour
Nutritional Information (per serving):
Calories: 350 kcal
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