What about Corned Beef and Cabbage isn't Jewish

Absolutely nothing.

Corned Beef and Cabbage
Serves 6

1 flat-cut Corned Beef, with whatever's in the package
6 Peppercorns
Dried spices (thyme, marjoram, whatever)
2 tsp Mustard
1 large onion, diced
1 beer
Water
1 lbs small white potatoes, whole
2 lbs small turnips, large cubes
1 head green cabbage, eighths


Put the corned beef and the other items in a large pot, and cover by an inch with water. Bring to a boil, and simmer for 3+ hours, turning once halfway through.

Remove the beef and keep warm. Trim any major fat deposits.
Add the potatoes and turnips into the broth, and cook 20 minutes. Add the cabbage, and cook for another 15.

Slice the beef thinly, and serve with mustard.