I also just substitute real food for processed ones. My favorite pot roast recipe was with onion soup mix, beef broth, and cream of mushroom poured over it. Now I use fresh onions, fresh garlic, real mushrooms, seasonings, homemade beef broth, and organic cream of mushroom (when I can get it with a coupon).
I like going to allrecipes.com type “slow cooker” in the search and then sort by ratings. I’ve found some great recipes this way. We love the Slow Cooker Chicken Taco Soup recipe from there. I adjust a few things like frozen/fresh corn, homemade taco seasoning, fresh tomatoes, and add a jalapeno, but I do use canned organic beans. Another one we love from there is Slow Cook Carnitas.