If you peel your sweet potatoes and slice them into thin slices it wont take long at all. Heat your water while your peeling and depending on how many you have it will take from 30 mins.- 1 hour. Try baking them whole on the BBQ grill. No additives needed it will bring out the natural sugar. They will taste like heaven .
Time varies by size when boiling sweet potatoes. The general rule of thumb is to boil for around 30 minutes. When boiling check the potatoes with a fork for tenderness. Once you are able to remove the fork with little effort, the potatoes can be removed.
The amount of time that it will take to boil a sweet potato will depend on the size of the potato and whether or not it is chopped. If you slice and peel your sweet potatoes and then cover them with water and boil them, they should be tender in about twenty minutes, if boiled on high.