Greek Chicken Gyros

Ingredients

• 1 ½ lbs (700g) boneless, skinless chicken thighs or breasts
• 1 cup Greek yogurt
• 4 cloves garlic, minced
• 2 tablespoons olive oil
• 1 tablespoon red wine vinegar
• 1 teaspoon dried oregano
• 1 teaspoon ground cumin
• 1 teaspoon ground coriander
• 1 teaspoon smoked paprika
• Salt
• pepper
• 4 pita bread rounds
• 1 cup cherry tomatoes, halved
• 1 small red onion, thinly sliced
• 1 cucumber, sliced
• 1 cup tzatziki sauce
• Fresh lettuce leaves