Combine all ingredients in a small bowl. Place your ham in a roasting pan fat side up. Slather generously with your mustard mixture. Pour about 1/2 cup of water into the bottom of the pan and place in a preheated 300 degree oven. Bake for about 15 minutes per lb. uncovered.
Slowcooker – You can also cook your ham roast in the slow cooker for the first couple of hours, instead of the oven… However, slow cookers are lower temperature, so follow the same instructions with water and seasoning but increase cooking time to at least 7 hours, and cook till internal temperature is 145º.
DO NOT Remove the FAT! Fat on your ham roast will give it flavor and help keep it moist through the cooking process. You do not have to eat it! Just cut any fat left on your roast after cooking and off before serving, if desired. ***The steam from the water in your roasting pan keeps your ham roast moist while it’s cooking!
Look at the nutrition label on the back of the ham to check and see. Also, if you are wanting to change up this recipe to fit your own taste, do not add too much more onion so you can keep it low carb.