Here is a very simple way to cook a beef roast in the slow cooker. It’s the way I usually cook it as I find the slow cooker to be the easiest way of cooking. I have never burnt a roast in the slow cooker. It also spreads out the time I spend in the kitchen preparing dinner.
You can sub the tomatoes if you wish. I have made this successfully with salsa in place of tomatoes when I didn’t have any in the house.