Place pine nuts in a single layer on a baking sheet.
Bake at 350° for 7 minutes or until toasted. Set aside.
Cook 1 cup blue cheese, half-and-half, and cream cheese in a heavy saucepan over medium heat, stirring constantly, 5 minutes or until mixture is smooth. Keep warm.
Toss cooked pasta with spinach strips and next 3 ingredients. Pour blue cheese sauce over pasta, and toss to coat. Sprinkle pasta with remaining 1/2 cup blue cheese and pine nuts. Serve immediately.