Tracy's Corned Beef and Cabbage

Start with a really large pot of water with 1 beer (it helps to tenderize the meat and gives a great flavor, and the alcohol does burn off), (put pickeling spice in a coffee filter & tie with string then through it in), I also sometime add seasoned meat tenderizer, you can really taste the difference. Add 1 sliced onion. Bring to a boil, add the corned beef (I like the flat cut, it seems to be more tender). Boil for 2 to 3 hours (more if needed, just check for tenderness). Add Turnip (chopped about a half inch thick), red potatoes cut in half, & the cabbage cut in two's or four's. Boil for another half an hour to an hour and it is good to go. Fill the plate and add just a little butter on top. Salt & Pepper to taste. Add some mustard or horseradish sauce also.