Much as I love a classic pumpkin pie, I have to be honest: My heart belongs to sweet potato pie.The only trouble with sweet potato pie is that it can be a bit more trouble to make. So I set out to make a 1-2-3-easy sweet potato pie that tastes every bit as good as the most complicated versions I've ever made.The key to a great sweet potato pie is fresh roasted sweet potatoes. Canned sweet potatoes do not work; boiling...