This Crock Pot French Dip Sandwiches recipe is one of the easiest crock pot hot sandwich recipes you will ever make. Need something you can feed a crowd during? Three simple ingredients and you can be munching on one of the tenderest steak sandwiches you have ever eaten.
Mix the two envelopes of Au Jus Gravy mix with 6 cups of water in a 4 quart crock pot slow cooker.
Cut the sirloin tip steak into strips and add to the crock pot along with the sliced onion.
Toss well.
Cover and cook on low for 4-6 hours.
When done divide the tender pieces of steak between 4 toasted sub rolls, add a slice of cheese to each sandwich if desired and melt under the broiler in your oven.