Combine the seasoning, salt, mustard powder, garlic powder and black pepper; set aside. Rinse the chicken thoroughly, and remove the giblets. Place chicken in a 9x13 inch baking dish. Sprinkle 1 1/2 teaspoons of the spice mixture inside the chicken. Rub the remaining mixture on the outside of the chicken.
Squeeze the juice of the 2 lemons into a small bowl or cup, and mix with the olive oil. Drizzle this oil/juice mixture over the chicken.
Bake in the preheated oven for 1 1/2 hours, or until juices run clear, basting several times with the remaining oil mixture.