Heat Oil In A Large Non-Stick Skillet Over Medium-High Heat. Add Oregano, Green Onions, Mushrooms And Garlic; Saute 3 Minutes. Add Tomatoes, Tomato Sauce And Pepper. Simmer 10 Minutes. Add Parsley, And Lemon Juice; Cook 5 Minutes Or Until Thoroughly Heated. Place Sauce On Pasta. Top With Cheese And Serve.