There’s really not much to say with how easy these are.
Cook your roast beef (frozen or fresh) 4 hrs. on High or 6-7 hours on low in the crock pot. I put some powdered ranch seasoning, you could also put in a can of sprite or coke, to cook in with the meat and fresh garlic.
Cut up the roast, sprinkle with cheese, and wrap up. Store in a Tupperware container in the fridge. Make a bunch of them.