1. Preheat the oven to 350 degrees F.
2. Butter or spray (whichever your prefer) the bottom of a 9 x 13 baking dish.
3. Without separating the rolls, slice the package of rolls in half (top & bottom).
4. Place the bottom half of the rolls in the baking dish. Top with the 6 slices of the provolone cheese, roast beef, french fried onions, remaining 6 slices of cheese, and the other half of the rolls.
5. In a small bowl, melt the butter in the microwave. Mix in 1 tablespoon of the au jus seasoning mix, Worcestershire sauce, sesame seeds, dried minced garlic, onion powder, and seasoned salt (salt is not necessary, so add this to your preference). Whisk until well combined.
6. Top the rolls evenly with this mixture until rolls are entirely coated. (It's okay if you don't use all of this mixture)
7. Bake the sliders uncovered until the cheese is gooey and the tops of the rolls are golden brown, about 20 minutes.
8. Remove and cut the sliders with a sharp knife.
9. While the sliders are baking, take the remaining au jus mixture and place in a small saucepan over medium heat. Add 2 cups cold water and whisk. Bring to a boil and then reduce the heat to a simmer to allow it to slightly thicken.
10 .Serve & enjoy! :)
**I prefer to buy rare London broil beef because as it cooks in these sliders it becomes medium.