Fusilli With Parsley-Mushroom Sauce
["1/2 c. plain low-fat yogurt", "1 Tbsp. olive oil", "1/4 c. grated Parmesan cheese", "1/8 tsp. black pepper", "2 Tbsp. sour cream", "1/4 c. minced parsley", "8 oz. fusilli, rotelle or spaghetti", "6 oz. mushrooms, sliced thin", "1 medium-size yellow onion, chopped", "2 cloves garlic, minced", "1/4 c. dry white wine", "parsley sprigs (optional)", "1/4 c. minced parsley"]
["In a small bowl combine the yogurt, cheese, parsley, sour cream and pepper; cover and refrigerate.", "In a large kettle cook the fusilli according to package directions, omitting the salt. Meanwhile, heat the olive oil in a heavy 7-inch skillet over moderately high heat for 1 minute.", "Add the mushrooms, onion and garlic and cook, stirring occasionally for 5 to 7 minutes or until the onion is soft.", "Add the wine to the mushroom mixture and cook for 1 to 2 minutes or until most of the liquid is absorbed.", "Add the yogurt-cheese mixture and heat through; do not boil or the sauce will curdle."]
["yogurt", "olive oil", "Parmesan cheese", "black pepper", "sour cream", "parsley", "fusilli", "mushrooms", "yellow onion", "garlic", "white wine", "parsley sprigs", "parsley"]