Step 3: Pre-Cook Sweet Potatoes
You need to soften the sweet potatoes to more easily mix their flesh in with the rest of the filling.
Stab the sweet potatoes with a fork, and microwave them for 5 - 10 minutes -- depending on the strength of your microwave -- or until soft but not mushy. Cut them in half and scoop out the flesh. I held my still-hot potatoes with a pot-holder while scooping. Mix in the butter and lightly mash, but don't puree.