For the Chicken Marinade:

• 2 lb (1 kg) chicken thigh fillets, boneless and skinless
• 3 large garlic cloves, minced
• 1 tbsp white wine vinegar (or red wine/apple cider vinegar)
• 3 tbsp lemon juice
• 1 tbsp extra virgin olive oil
• 3 tbsp Greek yogurt (preferably full fat)
• 1 1/2 tbsp dried oregano
• 1 tsp salt
• Black pepper to taste

For the Tzatziki Sauce:

• 2 cucumbers (to make about 1/2–3/4 cup grated cucumber after squeezing out the juice)
• 1 1/4 cups Greek yogurt (preferably full fat)
• 1 tbsp lemon juice
• 1 tbsp extra virgin olive oil
• 1 garlic clove, minced
• 1/4 tsp salt
• Black pepper to taste

For the Salad:

• 3 tomatoes, deseeded and diced
• 3 cucumbers, diced
• 1/2 red onion, finely chopped
• 1/4 cup fresh parsley leaves (optional)
• Salt and pepper to taste

To Serve:

• 4–6 pita breads or flatbreads