Mustard Plum Barbecue Sauce

The flavors of this sauce—sweet, spicy, a little tart—will be recognizable to any North American barbecue buff. But Uruguayans get there a different way, using plum preserves and dried plums for sweetness (instead of the usual North American ketchup), mustard for spice, and red wine for acidity. It probably began as British Cumberland sauce and acquired a Uruguayan accent somewhere along the way. This makes more sauce than you need for the pork steaks, but you’ll want to have a jar in the r