In a large bowl, combine olive oil, lemon juice, oregano, garlic powder, and salt. Add the chicken pieces and toss until they are evenly coated in the marinade. This mixture infuses the chicken with flavor while tenderizing it. Ensure the chicken is well-coated to prevent dryness during grilling. Allow the marinated chicken to sit for 30 minutes (up to 2 hours), occasionally tossing to ensure even distribution of flavors.
Blot the chopped cucumber with a clean kitchen towel to remove excess moisture, ensuring it won't water down your tzatziki sauce. In a small bowl, gently combine the cucumber, Greek yogurt, fresh mint leaves, minced garlic, and a pinch of salt. Mix well until all ingredients are evenly distributed. This step is crucial as too much liquid can make the sauce watery and less creamy.
Place the prepared tzatziki chicken skewers into a sealed container or wrap them tightly in plastic wrap to ensure they stay fresh. Store these in your cooler if you plan to prepare this dish ahead of time.
This step is crucial as it prevents the chicken from spoiling and maintains the freshness of the tzatziki sauce, ensuring that when you're ready to serve, the skewers are still juicy and flavorful.
Set up your grill or campfire to medium-high heat, around 375-400°F (190-200°C). Ensure it's hot enough for even cooking. You should see a good amount of steady, orange flames and a nice sear on the chicken skewers as they cook. Avoid using too much oil or fat that could flare up and cause smoke.
Thread the chicken pieces and your choice of vegetables (such as bell peppers, zucchini, or onions) onto metal or wooden skewers. Ensure each skewer is evenly balanced with alternating pieces to maintain even cooking. This step is crucial for a consistent cooking experience; make sure not to overcrowd the grill, which can lead to uneven heating.
Place the skewers on the grill grate once it is ready. Grill for about 3-5 minutes per side, ensuring even cooking by turning every few minutes. The chicken should be cooked through and slightly charred, while the vegetables will become tender and slightly caramelized. Avoid overcooking to keep the flavors fresh.
Carefully remove the chicken skewers from the grill or oven, ensuring they are cooked through and golden brown. Allow them to rest for a few minutes before serving. Arrange the skewers on a platter and serve with tzatziki sauce on the side for dipping. This allows the flavors to meld and ensures the meat is tender and juicy. Avoid overcooking the chicken, as this can make it dry and tough.