https://www.youtube.com/watch?v=G0n2OHlBPcQ
TLDR Slow-braised short ribs become exceptionally tender and rich, with red wine, vegetables, and herbs forming a glossy sauce balanced with mustard and vinegar, served over smooth celeriac-potato purée.
Season the short ribs and coat them lightly with flour before cooking. Brown them slowly on every side to develop a golden crust, which adds depth to the finished braising liquid. Work in batches if needed so the ribs brown rather than steam. Take care not to scorch the pan, since the browned bits will flavor the sauce.
Use a red wine you would enjoy drinking, and reduce it until syrupy to concentrate its flavor. In the same pan, caramelize the shallots, then gently sweat the leeks, celery, carrots, and garlic without letting them burn. Stir in tomato purée and return the ribs to the pot. Add the reduced wine, beef stock, and herbs to create the braising liquid.
Cover the ribs with a cartouche and braise them gently at 140°C for about four hours. For an overnight method, cook them at 85°C for roughly ten hours. The slow, moist heat transforms the connective tissue and makes the meat exceptionally tender. Check that the ribs are cooked through and easy to lift before removing them.
After braising, let the ribs cool in the liquid for 30–45 minutes. This helps them retain moisture and makes them easier to handle without falling apart. Lift them out gently, using a spatula or tongs with care. Strain the cooking liquid to prepare the sauce.
Reduce the strained braising liquid gently until it is thick, dark, and glossy, keeping its flavorful fat. Stir in whole-grain mustard and cherry vinegar, then taste and adjust the seasoning. A small amount of vinegar lifts the sauce’s richness and sweetness without making it sharp. Add the finishing ingredients gradually so the short rib remains the star.
Make a smooth celeriac-and-potato purée cooked with milk, then spread it across the plate as a bed for the meat. Place a tender short rib in the center and spoon over more red-wine sauce. The creamy purée balances the rich, glazed beef and completes a classic French braise.
Season and flour the ribs, then brown them slowly on all sides until they develop a golden crust.
Reduce drinkable-quality red wine until it becomes syrupy.
Add caramelized shallots, leeks, celery, carrots, garlic, tomato purée, the reduced wine, beef stock, and herbs.
Cover with a cartouche and braise at 140°C for about four hours, or at 85°C overnight for roughly ten hours.
Letting them cool in the liquid for 30–45 minutes helps keep them moist; lift them out gently afterward.
Strain and gently reduce the sauce until thick and dark, keeping its flavorful fat. Balance its richness and sweetness with whole-grain mustard, cherry vinegar, and seasoning.
Spread smooth, glossy celeriac-and-potato purée cooked with milk on the plate, place the rib in the center, and finish with more sauce.