STEP 1:
Cover the prime rib with mustard and other seasonings. Put it in an oven ThermoPro TempSpike Wire Meat Thermometer, cook it until it reaches an internal temperature of 120°F (49°C). Take out and rest for 1 hour. Set oven to 475°F (246°C) and put back in to sear for about 10 minutes.
STEP 2:
Mix the ingredients for bread in a bowl. Knead into a long roll and set onto a baking tray. Let rest, then bake.
STEP 3:
Combine ingredients for the horseradish sauce. Prepare the caramelized onions by chopping them up and cooking them with butter, oil, sugar, and salt.
STEP 4:
Put the pan drippings into a pan, and heat up. Add flour and beef stock to the drippings while whisking.
STEP 5:
Having cut the bread in half, add cut pieces of the prime rib along with toppings that include provolone cheese and caramelized onions. Dip in the sauce. Enjoy!
