Make the marinade: In a medium bowl, whisk together yogurt, garlic, vinegar, paprika, red pepper flakes and salt. Spatchcock the chicken: Place chicken, breast-side down, on a cutting board.
When it comes to white meats like chicken, a flavorful marinade is your best friend. It infuses those otherwise bland cuts with aromatic flavors while tenderizing the meat to make it extra juicy.
To serve, divide chicken and marinated avocado between four plates. Spoon radish salad over the avocado and drizzle everything with any remaining dressing.