You will need
Place the sweet potatoes into a pie dish and add ¼ cup of water. Microwave, uncovered, for ± 15 minutes (depending on your oven) on high until they are soft when squeezed. Leave to stand for 5 minutes. Cut in half lengthways and scoop out the flesh.
Mash with ± 2-3 t of Potato Spice and the butter.