Coat a large roasting pan with olive oil and bring to a high heat. Season the brisket generously with salt. Add the brisket to the pan and brown well on both sides. Remove the brisket from the pan and reserve.
Preheat the oven to 375 degrees F.
Lower the heat to medium, ditch the excess oil, and add the bacon and reserved skin to the pan with a little more oil. Cook the bacon, stirring occasionally, until the bacon is crispy and has let out a lot of fat. Add the onions and celery. Season with salt and cook until they are very soft and aromatic, 7 to 8 minutes. Add the garlic and cook for another 2 to 3 minutes. Toss in the mushrooms and cook until they are soft and wilted. Add the balsamic vinegar and reduce it by half. Taste it - it will be very vinegary, but that's ok, don't worry. Season with salt, if needed. Lay the brisket on top of the veggie mix and add the chicken stock to the pan until it just covers the brisket. Add the bay leaves and thyme.
Cover the pan with foil and roast in the oven. Roast for 1 hour, check the brisket, and turn it over. Add more stock if the liquid level has reduced. Cover the pan again and return it to the oven for another hour. Remove the foil and roast for 30 minutes more.
Remove the roasting pan from the oven, transfer the brisket to a cutting board, cover with foil, and let rest for 20 minutes.
Skim off any excess fat from the cooking liquid. If the vegetables are swimming in liquid, reduce the liquid on the stovetop over medium-high heat. You want the sauce to be soupy. Taste the liquid and re-season if needed. Slice the brisket against the grain on the bias. Serve topped with the onion-mushroom mixture and sprinkle with chopped chives.

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Nutrition Facts

Per Serving Per 100 g

Amount Per 1 Serving
Calories	444.32 Kcal (1860 kJ)
Calories from fat	189.6 Kcal
		% Daily Value*
Total Fat	21.07g	32%
Cholesterol	66.54mg	22%
Sodium	1639.28mg	68%
Potassium	1026.08mg	22%
Total Carbs	32.32g	11%
Sugars	19.61g	78%
Dietary Fiber	2.21g	9%
Protein	27.11g	54%
Vitamin C	27.3mg	45%
Iron	110.5mg	614%
Calcium	121.2mg	12%

Amount Per 100 g
Calories	84.77 Kcal (355 kJ)
Calories from fat	36.17 Kcal
		% Daily Value*
Total Fat	4.02g	32%
Cholesterol	12.69mg	22%
Sodium	312.73mg	68%
Potassium	195.75mg	22%
Total Carbs	6.17g	11%
Sugars	3.74g	78%
Dietary Fiber	0.42g	9%
Protein	5.17g	54%
Vitamin C	5.2mg	45%
Iron	21.1mg	614%
Calcium	23.1mg	12%

* Percent Daily Values are based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Find out how many calories should you eat.

Tastes

salty
savory
bitter
sweet

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