Procedure for pasta:

To toast walnuts, bake in oven at 300°F for 20 minutes, until light brown. Set toasted nuts aside.
Cook the Fusilli in a large pot of boiling salted water according to package directions. Drain in a large colander, rinse under cold running water for a few minutes to stop the cooking, and drain again. Transfer fusilli to a large bowl and toss with the olive oil to prevent sticking.

Procedurefor condiment:

Combine dressing ingredients in a small bowl and whisk until smooth.
To serve, toss the cheese, vegetables and toasted nuts with the pasta. Add the dressing and mix thoroughly. Cover with plastic wrap and chill until ready to serve.