Step 1: In a large bowl, whisk together yogurt, olive oil, garlic, lemon juice, oregano, paprika, salt, and pepper to create the marinade

Step 2: Add the chicken pieces to the marinade and mix well to coat, cover and refrigerate for at least 30 minutes or up to 2 hours

Step 3: Preheat grill to medium-high heat, thread the marinated chicken onto skewers, leaving a small space between each piece

Step 4: Grill the skewers for 10-12 minutes, turning occasionally, until the chicken is cooked through and slightly charred

Step 5: Meanwhile, prepare the tzatziki sauce by combining the grated cucumber, chopped dill, and a pinch of salt in a bowl, let it sit for 5 minutes to allow the cucumber to release excess water

Step 6: Squeeze out as much liquid as possible from the cucumber mixture using a paper towel or cheesecloth, then mix in 1/4 cup of plain Greek yogurt

Step 7: Season the tzatziki sauce with salt and a squeeze of lemon juice to taste, refrigerate until ready to serve

Step 8: Once the skewers are cooked, let them rest for a few minutes before serving with the chilled tzatziki sauce for dipping

Step 9: Garnish with additional dill and lemon wedges if desired, serve immediately and enjoy