Pasta with Pesto Sauce (Pasta con Pesto)

2/3 cup packed coarsely chopped basil leaves
1/3 cup grated Parmesan cheese
1/3 cup olive oil or vegetable oil
2 tablespoons pine nuts or walnuts
1/2 teaspoon salt
1/8 teaspoon pepper
1 clove garlic
10 ounces uncooked spaghetti or noodles
2 tablespoons butter or margarine

Place all ingredients except spaghetti and butter in blender container. Cover and blend on high speed until mixture is of uniform consistency. Cook spaghetti as directed; drain. Toss spaghetti with basil mixture and the butter. Serve with additional Parmesan cheese if desired.

Yields 6 servings.