Place corn beef in Dutch oven with water to cover. If your corned beef hasn't come with a spice packet (or the spice packet is very small) add some mixed pickling spice to taste.
Boil until tender. When tender, remove from Dutch oven and trim off fat.
Note: Save the broth to make Corned Beef Soup.
Mix together brown sugar and mustard and glaze corn beef. Bake at 375 degrees for 20 minutes.
Serve with Boiled Cabbage, Garlic Red Mashed Potatoes, Carrots & Pearl Onions, and Irish Brown Bread for a complete St. Patrick's Day meal.