I've been informed by my family (again) that it's not Easter Sunday without the traditional ham in the oven. I've baked a lot of Sunday hams using every recipe under the sun and the one they talk about is the year I didn't have any "fancy ingredients". It's by far the easiest, so that's what they're getting this year.
Years ago, we received a ham as a bonus from my wife's job. I didn't spend a lot of thought on it. I just made a regular yellow mustard and brown sugar paste, slathered it on, wrapped it in tin foil and tossed er' in the oven for 4 hours. It was incredible.
Bone in Whole Ham (12-15 lb)
Half cup yellow mustard
3/4 lb brown sugar
Heat oven to 350. Remove the outer wrappings and trim excess fat from ham. Whisk brown sugar and mustard into a thick paste and coat ham. Spray baking pan and underside of aluminum foil with cooking spray. Tightly cover ham and bake for around 4 hours. Let ham sit for at least 30 minutes before carving.