Preheat oven to 350 degrees Fahrenheit (175 degrees Celsius).

Place the brisket into a deep baking dish. Rub the ginger, onion soup mix, and salt onto the meat. Sprinkle the garlic cloves all around the pan. Place the chopped celery on top of the meat and spread the sautéed onions over it. Pour the chicken stock around the meat. Cover tightly and bake for three and a half hours.

Remove the meat from the pan. Cool and slice. To serve, arrange the sliced brisket on a plate and pour the veggies and sauce over the top.