Pasta with Bacon and Radicchio

Rinse radicchio, pat dry and cut into strips. Peel the onions and chop finely. In a skillet, heat the butter over medium. Add the bacon, onion and radicchio.

Cook, stirring occasionally until the bacon is cooked through, the onion is translucent, and the radicchio is tender, about 7 minutes.  Season with salt and pepper. In a large pot of boiling salted water cook the pasta according to package directions until al dente. Drain.