Reduce the wine until sweet and syrupy
Sear the ribs at 275°F (140°C). Build a deep crust without burning the pan
Caramelize the shallots, then add the rest of the vegetables. Stir in tomato paste
Deglaze with the reduced wine. Add ribs, stock, bay leaves, and thyme
Cover with a cartouche. Braise at 275°F (140°C) for 3.5 to 4 hours
Rest in the liquid 30 to 45 minutes. Strain and reduce the sauce
Finish with mustard and vinegar. Season to taste
Simmer celeriac and potatoes in milk. Blend with butter until smooth
Serve celeriac purée down first, rib on top, spoon over the glossy wine glaze
