Lomo de Cerdo con Salsa de Cebollas RojasA cooked tangy red onion sauce spooned over roasted pork is a modern adaptation for this Mexican-style dish that's been a favorite among my cooking students.
Season all over with the oregano, garlic, salt, and pepper.
Place the roast in a roasting pan on a rack and roast, uncovered, until browned and no longer pink inside, about 1 hour 10 minutes, or until a meat thermometer reads 160°.
Meanwhile, prepare the onion sauce.
When the roast is done, remove it from the oven and let it rest about 5 minutes.
Reheat the sauce.
Slice the meat and arrange on a platter or individual serving plates with a portion of the onion sauce spooned on top.