Corned Beef And Cabbage With Irish Mustard Sauce

Ingredients

• 1 bay leaf
• 1 Tbsp butter
• 2 lb cabbage
• 1 large carrot
• 0.25 c cider vinegar
• 4 lb corned beef brisket
• 1 Tbsp cornstarch
• 1 tsp dry mustard
• 2 egg yolks
• 1 bunch fresh parsley
• 1 tsp horseradish
• 2 lb new potatoes
• 3 medium onions
• 0.25 tsps pepper
• 2 tsps sugar