Italian Beef Sandwiches

Ingredients:
3 pound Sirloin Tip Roast
2 packages of Au Jus dry mix
2 packages of brown gravy with mushrooms dry mix
1 package Italian salad dressing dry mix 
Hoagie Rolls

Directions:
Place roast in greased slow cooker. Add 1 cup water. Sprinkle dry mixes on top of roast.
Cook on low for 8 hours. 

Slice meat into thin slices.
Serve on hoagie rolls with mayonnaise and mustard.
Prepare additional Au Jus mix for dipping.