Preheat the oven to 425. Rinse chicken, inside and out, with cold water and pat dry with paper towels. Mix lemon, onion, and 2 tsp. Opa! Essence in bowl and drizzle with olive oil. Fill chicken cavity with lemon mixture and truss. Mix butter, 2 tsp. Opa! Opa!, and olives in a small bowl. Pull the skin of the chicken away from the breast to make a pocket and pack the butter mixture under the skin.. Drizzle chicken skin with olive oil and sprinkle with 2 tsp. Opa! Essence. Rub. Bake chicken for approximately 10 minutes per pound or until juices run clear and the internal temperature in the thickest part of the breast reaches 160 degrees.
