For just me, I nuke 'em good! Takes less time for sweet potatoes than regular, so maybe 6 minutes total?? Again, super simple, slice in half, scoop out the insides if you want, and otherwise butter and salt and pepper.
I have tons of recipes too. I personally liked the yams with the marshmallows but the rest of my family did not... One easy dish that went over pretty well at the holidays was to peel and slice into basically steak fry slices, put in a baking dish with sides and pour some pineapple juice over the slices and bake "until done".