Heat the oil on a medium heat in large pan with a solid bottom (like a Dutch Oven) then add the onion and saute for a couple minutes, now add the beef and brown it for a couple of minutes.
Cook it on the stove top on a low simmer for one to two hours with a lid on the pot, do not boil and check after one hour for doneness.
Now you want to add the beef, onions, butternut squash and all remaining ingredients into the slow cooker.
NOTE - I have two slow cookers and the newer one is hotter on the high and low settings than the older model.
*I have found it hard to find store bought paleo or whole30 beef broth for this recipe so you would need to use homemade beef broth, or you could just use water as an alternative, it won't be quite as rich but it will work.
You will need a decent sized pan with a heavy bottom, or Dutch oven, to cook this stew on the stovetop. If your pan is very thin your stew will almost certainly burn before it is cooked.
Alternatively you can cook it easily in a slow cooker, that would work well too.
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