Prime Rib French Dip Sandwiches

To cook the prime rib, season the roast with salt, pepper, and garlic powder, then coat it evenly with compound butter.

Place the roast in the oven and bake at 500°F for 5 minutes per pound.

After the initial high-heat cooking, turn the oven completely off. Leave the roast in the oven with the door closed for 2 hours to finish cooking.

Once the roast is cooked and you have leftovers, slice the meat very thinly.

In a large skillet over medium heat, warm the au jus. Add the thinly sliced prime rib to the skillet and toss to warm through.

Preheat your oven to 400°F. Slice hoagie rolls in half lengthwise and place them on a baking sheet.

Spread horseradish sauce on the inside of the rolls.

Pile the warm, au jus-soaked beef onto the rolls, followed by slices of provolone cheese and a generous amount of crispy fried onions.

Bake the open-faced sandwiches at 400°F until the cheese is fully melted.

Serve immediately with a side of the remaining warm au jus for dipping.