In the meantime, in March 2017 the government announced that VAT is to be added to the cost of roaming in countries outside the EU. The result is that the cost of calls, texts and data is set to go up by 20%. At the time of writing, we don't know for sure when the charges will come into affect.
Bring to boiling. Add sweet potatoes. Cover the pan and cook sweet potatoes for 10 to 12 minutes or until just tender on the outside but resistant in the center when pierced with a knife. For soft, tender sweet potatoes, cook for 25 to 30 minutes.
Boil the potatoes for 10 to 12 minutes -- 12 for large potatoes, 10 for medium -- and drain them in a colander. Next, use tongs to transfer the hot potatoes to a sheet pan and brush them liberally with olive oil or butter. Bake until the skin sizzles and browns, about 10 minutes.ake the potatoes for 30 minutes, lower the heat to 250 F and place a pot with about 1 inch of hot water in the bottom of the oven. The potatoes will be ready in 1 hour -- but stay fresh for another 2 hours. That's the advantage of the method.