I'm guessing you mis-typed cook.
Crock pots are super flexible, cheaper meats are better tasting.
Browning meats will improve flavour but is not mandatory.
Start with root vegetables: potatoes, turnips, carrots, parsnips, etc.
Then add flavourings: onions, leeks, celery, garlic, etc.
Thirdly, whatever meat you prefer: beef, chicken, pork, lamb, etc.
Pour in at least a cup of liquid: bouillon, consomme, wine, water, etc.
Cook either 5-7 hours on LOW, or 3-5 hours on HIGH.
Things like canned beans, macaroni, rice, frozen veggies, etc.
can be added in the last 15-30 minutes for shorter cooking time.