Start by combining the spice mixture and then use it to cover the whole chicken.
Combine the stick of butter (cut into small pieces) with the mayonnaise and the mustard and then cover the entire chicken. Cover in plastic and let marinate all night.
Make the filling by cooking the ground beef and then adding the rest of the ingredients. Put inside the chicken.
Combine all of the ingredients for the Adobo sauce in a blender and blend until everything is combined and broken down. Pour over the chicken.
Bake at 400 degrees for 1.5 hours.