Pasta with Grilled Apple Slices and Gorgonzola

Cook pasta in plenty of salted water until al dente. Rinse arugula and radicchio, cut radicchio into strips. Rinse and dry celery, cut into pieces. Toast walnuts in a dry a pan. Rinse apples, cut into slices, core. Heat butter in a grill pan, cook apple slices for about 3 minutes per side.

Remove from heat and add onions and celery to pan, mix well. Drain pasta, toss in a bowl with salad greens, celery, walnuts, apple slices, onions and Gorgonzola.