2. Chop of the onions into large pieces and place in the roaster.
3. Place the corned beef on top of the carrots and onions.
5. Spread the yellow mustard all over the top of the corned beef.
6. Pour the entire bottle of beer into the roaster.
7. Mix 1/4 cup of brown sugar in 1 cup of hot water and pour into the roaster.
8. Chunk up some potatoes and place them on top of the meat in the roaster.