To make the marinade, measure all the ingredients into a shallow dish and mix well. Add the short ribs and mix well to coat. Leave for 2 hours or overnight in the fridge, if possible, to marinate.
(The dish is best when made a day ahead and reheated ... and place in ice water to allow the scallions to curl. To plate: Place short ribs on a large platter, add the vegetables, and cover ...
Swap Option: Instead of short ribs, try chuck roast, which is less expensive and can be cooked the same way. Technique Tip: If time allows, make this ragu the day before you need to serve it.