Whisk together water, salsa and seasoning packets.
Place roast in slow cooker.
Pour seasoning mixture over roast.
Cover and cook on low for 8-10 hours, or high for 4-5 hours.
Cut each roll in half and place on a baking sheet. Place a slice of swiss cheese on the bottom half of each roll.
Place baking sheet in oven with broiler on low. Broil for 1-2 minutes or until edges of the rolls are golden and cheese has melted (be sure to watch them closely so they don't burn!). Remove baking sheet from oven.
Place a spoonful of shredded beef on top of each roll with swiss cheese on it.
Mix sour cream, chili sauce and horseradish sauce until well combined and spread on the top half of each roll.
Assemble each slider by placing the top half of the roll on top of the bottom.
We know how hard it can be to get dinner on the table. That is why we created the Six Sisters’ Menu Plan Membership! Each week you will receive a weekly menu plan(that includes 6 main dish recipes, 2 side dish recipes and 2 dessert recipes) and a detailed shopping list to make grocery shopping a breeze! We have done all the busy work for you, so you just need to shop and cook!