Very, very tasty. I forgot to add the mustard, but it didn't seem to detract from the dish at all. I used 1 medium onion, 3 medium carrots, and 3 ribs of celery, 1/2 Lb of each seems too much. FYI, 2 1/2 Cups beer is 2 cans or bottles. Do not use a beer short on flavor, use a good medium to dark beer, and it will impart some great flavor to the meat and sauce!