Melt the oil and butter together in a saucepan set over low heat. Add the peas and mushrooms and cook about 3 minutes. Add the cream, stirring constantly, until the sauce thickens, about 5 minutes. Add the grated Parmesan, salt and pepper; cook another 2 to 3 minutes. Put the pasta in a large bowl, add the sauce and mix well to combine.
Per Serving: 509 Calories (42.2% from fat); 24g Fat ( 10g Sat, 11g Mono, 2g Poly); 14g Protein; 60g Carbohydrate; 3g Dietary Fiber; 39mg Cholesterol; 317mg Sodium. food Exchanges: 4 Grain (Starch); 1/2 Lean Meat; 4 Fat.