Rosemary-Prime-Dijon-Rib
Ingredients : • 2 white onions, cut to 1-inch (2.5 cm) slice • ¼ c Dijon mustard • 1 prime rib (about 6 lbs/2.7 kg) • 1 1/2 cups (375 ml) kosher salt • ⅓ c ( 75 mL ) prepared horseradish • 2 tbsp (30 ml) mustard seeds • 2 tbsp (30 ml) fresh ...