Pasta with Green Beans, Potatoes and Pesto

2 tablespoons walnut oil

1/2 cup toasted walnuts

1/2 pound green beans, -- blanched

Salt and pepper 2 Yukon gold potatoes, -- peeled and parboiled

1 pound penne or fusilli, -- cooked

Parmesan cheese, -- grated 3/4 cup pesto

In large pot gently heat oil. Quickly saute green beans. Add potatoes, pasta and pesto. Cook until warm. Stir in walnuts. Season with salt and pepper. Serve topped with grated cheese.