2 stalks celery, halved
4 carrots
1 medium onion, cut in 4 wedges
4 to 6 red potatoes, quartered
1 4 -pound corned beef brisket
12 -ounce bottle stout or dark ale
1 tablespoon corned beef spices or pickling spices (or spices that come with the brisket)
1 medium head cabbage, cut into 6 wedges

Creamy Horseradish Sauce:
1/2 cup heavy cream
1/4 cup sour cream
1/4 cup drained prepared horseradish
dash hot sauce
salt and pepper to taste