Preheat your grill to high heat, clean, and lower to medium heat.
While the grill is preheating you'll want to rinse and chicken, and pat dry with paper towel. Then drizzle olive oil over chicken, sprinkle Greek seasoning, dill, and feta on both sides of the chicken. Make sure all parts of the chicken is covered.
Place the chicken on the grill. Grill for 5 minutes on each side or until internal temperature reaches 165 degrees. Serve immediately.