Step 1: Preheat oven to 375 °F (190 °C). Step 2: Gently lift skin of chicken thigh to create a pocket. Place on a parchment lined baking sheet. Step 3: In a bowl, make stuffing with both cheeses, sundried tomatoes, breadcrumbs, garlic, zest, basil & egg yolk. Season, mix well to combine and set aside. Step 4: With a spoon, gently and generously place cheese mixture under the chicken skin by pushing stuffing as far inside as possible, making sure not to break the skin. Using your fingers, rub stuffing under the skin to spread it evenly. Brush chicken skin with olive oil, then season with salt & pepper. Step 5: Place in oven and bake for 45 minutes or until skin is golden brown and juices run clear.