There are so many differant way's to prepare a sweet potato and it is really so simple to make a large batch or just make as needed.
Pre-heat your oven to 375 Deg F, Scrub the potato, stick it several times with a fork and bake it for around 45 mins, until it feels soft., then split the skin and scoop out the soft flesh.
Peel and cut the sweet potato into chunks. Use just enough water to cover the potato, then cover the pot and bring to the boil. Reduce the heat, then simmer until tender. Drain straight away, or the pieces will become mushy and watery.
Place peeled sweet potato cubes on a steamer rack over a pan containing around an inch of water. Cover and bring the water to a boil. Reduce the heat and steam for 10-12 mins.
Poke a whole sweet potato with a fork, then place in microwave on high for around 5 mins. Allow the potato to stand for a anotherr 5 mins - it will continue to cook during this time and will soften more.