As one legend of the origin of mole sauce tells it, nuns in Mexico put together a random assortment of ingredients upon hearing that the archbishop was coming to visit. The only meat they had on hand was an old turkey who wandered the grounds, and so they cooked it and ladled their sauce over the top.
Ladling mole over meat is the most common way to serve it. Of course, you can also combine the meat and sauce together before serving for tacos and burritos. It's also delicious served in enchiladas.