Nakami Nu Shimun

2 lbs. chuck roast 2 T. oil 1 large onion, chopped 3 cloves garlic, chopped 3 tsp. allspice 10 peppercorns 2 bay leaves 2 T. brown sugar 2 T. wine vinegar 1 cup tomato sauce 1 cup white wine 2 cups beef broth 1/2 small head cabbage, chopped 4 cups chopped kale 6 stalks mint…