01 -
In a small bowl, whisk together olive oil, lemon juice, garlic, oregano, salt, and black pepper until well combined.
02 -
Place the diced chicken in a large resealable plastic bag or bowl, pour the marinade over the chicken, and toss to coat evenly. Seal and refrigerate for 45 minutes to 1 hour.
03 -
If using wooden skewers, soak them in water for at least 30 minutes to prevent burning. Thread the marinated chicken onto the skewers, leaving small gaps between pieces.
04 -
Preheat the grill to medium-high heat and lightly oil the grates. Grill the skewers for 8 to 10 minutes, turning occasionally until golden brown and the internal temperature reaches 163°F (73°C). Optionally, baste once with reserved marinade during grilling and discard any leftover marinade. Let rest for 5 minutes before serving.
05 -
Preheat the oven to 350°F (175°C). Arrange the marinated chicken pieces on a greased baking sheet and bake on the top rack for 5 to 7 minutes per side, until the internal temperature reaches 163°F (73°C). Rest for 5 minutes prior to serving.
06 -
Warm pita bread on the grill or in the oven. Fill each pita with grilled chicken, sliced tomatoes, red onion, tzatziki sauce, and a drizzle of fresh lemon juice. Serve immediately.