1. Preheat the oven to 325 degrees Fahrenheit. Rinse the meat under cold water to remove any extra fat. Place the fatty side facing upwards in a large roasting pan with a roasting rack, then pat the meat dry.
2. Mix and crush allspice, cloves, and coriander in a medium-sized mixing bowl; do this with the end of a wooden spoon or in a mortar using the pestle to crush the spices into somewhat smaller bits. (It’s fine to leave some in their whole form) Mix black pepper, brown sugar, and crushed spices in a medium mixing bowl. Using your hands, evenly distribute the spice mixture over the top of the brisket. Cover the brisket with aluminum foil and 6 cups of water in the roasting pan. Roast the brisket for 2 hours, then take off the foil and continue to roast for another hour or until the meat is cooked.
3. Leave the cooked brisket to stand for about 15 minutes before slicing into it and serving as you please.

If you’d like more ideas on how to cook tender corned beef, check out this video recipe.