In a bowl, mix olive oil, garlic powder, onion powder, oregano, salt, and pepper. Add the chicken slices and marinate for at least 30 minutes.
Grill the chicken until cooked through and slightly charred, about 3-4 minutes per side.
For the tzatziki, mix grated cucumber, Greek yogurt, feta cheese, dill, and lemon juice in a bowl. Season with salt and pepper to taste.
Warm pitas in the oven or on the grill for about 1 minute on each side.
To assemble the gyros, spread tzatziki on each pita, add chicken, and garnish with tomatoes, onions, and lettuce.
Roll up the pita and serve.
Prep Time: 40 minutes | Cooking Time: 10 minutes | Total Time: 50 minutes
Kcal: 510 kcal | Servings: 4 servings
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