Linguine with Spinach Pesto

1 lb Spaghetti, Linguine, or Thin Spaghetti, uncooked
1 10 oz package frozen spinach, thawed, well-drained
2 Tbs vegetable oil
1/4 cup grated Parmesan cheese
2 Tbs chopped parsley
2 cloves garlic
1/2 tsp salt
1/2 tsp dried basil
2 Tbs butter or margarine
1/3 cup water
4 oz crumbled Feta cheese

Prepare pasta according to package directions; drain.

In blender or food processor, combine spinach, oil, Parmesan
cheese, parsley, garlic, salt and basil. Blend at medium speed or
process until finely chopped.

Melt margarine in water. With blender or processor running,
gradually pour in melted margarine mixture until blended.

Toss with pasta. Sprinkle Feta on top and serve.

(Source - Super Side Dishes )