French Dip Sandwiches

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French Dip Sandwiches 
1lb Leftover roast beef or Beef sliced from the deli
Au jus mix (I buy the packet from the store and mix it as directed)
optional- 1/2 Sliced yellow onion sauteed in olive oil until translucent
French rolls or chibatta buns
Provolone Cheese slices

Mix the Au jus according to the package directions. Place Au jus, meat and onion into crockpot. Heat until meat is warm. Serve on a toasted roll, with some onions and provolone. Dip sandwich in extra Au jus if desired.

*bad picture, but hey at least I took one!