Crock Pot Italian Beef Sandwiches* So, I don't have all those yummy USA ingredients, so I made my own version. I cut up some pepperoncini peppers and poorer in some jalapeño juice, put half a package of onion soup, some vinegarette instead of Italian dressing, and then some beef broth. Bam. So delish. Towards the end, I added in half an onion and some red pepper to give it some color and veggies.