In a large mixing bowl, combine the ground chicken, breadcrumbs, crumbled feta cheese, chopped parsley, minced garlic, dried oregano, salt, and pepper. Mix well using your hands until sticky.

Divide the mixture into four equal portions and form them into patties about 1 inch thick. Wet your hands slightly to prevent sticking.

Heat a non-stick skillet or grill over medium heat and add a tablespoon of olive oil if desired.

Cook the patties for about 5-7 minutes on each side, or until golden brown and cooked through.

While they cook, prepare the yogurt sauce by mixing Greek yogurt, lemon juice, chopped dill, salt, and pepper in a separate bowl until smooth.

For the relish, combine diced cucumbers, diced tomatoes, and red onion in another bowl. Optionally drizzle with olive oil and toss to combine.

Once the patties are cooked, serve them on buns or favorite greens with the yogurt sauce and fresh relish on top.