sweet and sour brisket

1 (3-pound) beef brisket, first-cut or flat-half cut, trimmed of any excess fat
1 teaspoon salt
1/2 teaspoon freshly ground black pepper
2 tablespoons canola oil
1 medium onion, cut in 1/2, then thinly sliced into 1/2 moons
3 cloves garlic, chopped (about 1 tablespoon)
One 15- oz. can tomato sauce, preferably no salt added
1/4 cup low-sodium chicken broth or water
3 tablespoons firmly packed dark brown sugar
1/3 cup plus 1 tablespoon cider vinegar
1/3 cup raisins
5 black peppercorns
1 allspice berry

Pat the brisket dry and sprinkle with the salt and pepper. Heat 1 tablespoon of the oil over medium-high heat in a Dutch oven or braising pot. Sear the brisket until it is browned, 4 to 5 minutes per side. Transfer the brisket to the crock pot.

Add the remaining 1 tablespoon oil to the pot and cook the onion, stirring a few times, until softened, 3 to 5 minutes. Add the garlic and cook, stirring, for 1 minute. Add the tomato sauce, broth, brown sugar, 1/3 cup of the vinegar, the raisins, peppercorns, and allspice and stir to combine well. Bring mixture to a boil. Pour mixture over brisket. Cook until the brisket is fork tender, 2 1/2 to 3 hours.

Remove the brisket from the oven, transfer the meat to a cutting board, and let rest for 10 to 20 minutes or, if serving later, cover and refrigerate the meat and sauce for several hours or overnight. When you are ready to serve, cut the meat against the grain into 1/4- inch thick slices. Stir the remaining 1 tablespoon vinegar into the warm sauce. Return the sliced brisket to the sauce until heated through, then serve.

give credit: healthy appetite