Blender Spinach Sauce

1 cup chopped/washed/drained spinach
2 tblsp olive oil
1/2 cup no fat plain yogurt
crushed garlic, dried basil
1 handful of fresh chopped parsley
Juice from one lemon
2 tblsp crumbled feta cheese

Whirl all ingredients -- except Feta cheese -- until chunky-smooth. Add warm water to thin a little if necessary. Cook pasta (al dente). Toss pasta with a little margarine then add sauce -- mix very well -- add feta cheese and toss again.