Set the Instant pot (see notes for slow cooker instructions) to sauté and melt 1 tbsp of coconut oil
Add in the chuck roast, season with salt and pepper, and satue the chuck roast until lightly browned (this takes 4-5 minutes)
Add in the broth, red onion, and garlic
Place the lid on the Instant Pot, seal the valve, and set it to MANUAL for 60 minutes
While the roast begins to cook, set the oven to 400 F and line a baking sheet with parchment paper
Scrub the sweet potatoes well, rub them in coconut oil, and make a slit down the center
Roast the sweet potatoes in the oven for 45-60 minutes or until cooked through (cooking time varies depending on the size)
Remove the sweet potatoes from the oven and set aside
Once the Instant Pot is done and the roast in cooked, carefully quick release the pressure
Remove the lid on the instant pot and spoon out the excess broth (save it for soup... it's delicious!) and the onion
Pour in the BBQ sauce of choice and shred the roast to incorporate with the BBQ sauce
Stuff the sweet potatoes with the BBQ beef and top with cilantro to serve