My absolute favorite way to eat sweet potatoes:
thinly slice them and lay them on a baking sheet. Smother them in olive oil. add corse black pepper and a good palm-full of provincial herbs (lavender, chervil, basil, rosemary, tarragon, garlic, marjoram, savory, thyme, and parsley). Bake them at 350 for about 20 minutes.
You can use fresh herbs if you are feeling motivated, which I sometimes am, or you can by Herbs of provence with them already dried cut and mixed in one handy little jar (found in your local spice section)