Pesto Spaghetti Recipe

Combine basil, pine nuts, parsley and garlic in processor or blender and puree; add oil and butter gradually in a slow, steady stream until mixture is the consistency of mayonnaise. Add white pepper and salt to taste. Pour sauce over cooked spaghetti in a large shallow serving bowl and toss well. Serve immediately with Parmesan cheese. Finely chopped walnuts substitute for pine nuts. The sauce can be frozen.