With a sharp knife stab each sweet potato a number of times evenly across the sweet potato.
Place sweet potatoes on the rack in the oven. If you don't want any mess you could place them on a tray, however I prefer them on the rack and place an aluminium foil lined tray at the bottom of the oven.
Bake for 1 to 1.5 hours depending on the size of your sweet potatoes.
You can tell if they are cooked by pushing a skewer through the sweet potato or by pressing on the sweet potato - it should feel soft under the skin.
You can eat them straight away as part of your meal. A dob of coconut cream goes well! Or if you want to make mashed sweet potato, simply scoop out the flesh with a spoon. Place the flesh into a large bowl and mash.
Recipe by Planning With Kids at https://planningwithkids.com/2014/06/16/baked-sweet-potatoes/