I would like to make ham for Christmas eve dinner and am wondering if I can bake the ham before we leave for church and then keep it in the oven on warm for the hour and a half we will be gone. I'm not sure if I should cut the ham before we go or right before we eat. I'm thinking if I slice it and then put it in the oven on warm it will dry out. Or, should I just try to time it so the ham will cook while we are gone and be done when we get home. I'm worried about overcooking it if I try cooking it while we are gone.