After enjoying a Standing Rib Roast for Christmas Eve or New Year's Eve dinner, use the leftover beef to make these delicious French Dip Sandwiches. A French Dip Sandwich consists of thinly sliced roast beef piled high with a few slices of Swiss cheese and is served on a hoagie style bun (or a sub roll) then cut in half for ease of handling.
Roasted and boneless Prime Rib makes the best "french dip" sandwiches because of the tenderness of the cut, not to mention the flavor. Simply trim the tail off of the leftover prime rib and thinly slice the beef for the sandwiches.
Serve with fries and a cup of au jus to dip the sandwich into (add a few croutons and a sprinkle of mozzarella cheese to the au jus and you have a yummy bowl of French Onion soup to dip into).
Beef Au Jus Dipping Sauce
1 Large Onion, thinly sliced
3 TB Butter
1 tsp White Pepper
1 tsp Kosher Salt
1/2 tsp Black Pepper
2 tsp Beef Base (optional)
Trimmings from the Prime Rib Roast
1 can Beef Broth
5 cups Water
In a large pot melt butter over medium-high heat and add the sliced onion. Saute until tender. Add the remaining ingredients and simmer at least 1 hour (90 minutes if possible to produce the best flavor), stirring ocassionally. Taste test during the last 30 minutes and adjust the salt and pepper as needed.