Heat Olive Oil, Garlic Cloves And Rosemary In Large Deep Skillet, Stirring Occasionally, Over Medium Heat, Until Garlic Is Golden Brown On All Sides. Remove Pan From Heat. Discard Garlic. Cook And Stir Mushrooms In Olive Oil Until Tender. Season With Salt And Pepper. Add Pasta And Red Onion To Skillet. Cook And Stir 3 To 4 Minutes. Add Spinach And Parsley. Cook And Stir Until Spinach Is Wilted. Remove From Heat. Add Butter, Pine Nuts And Cheese. Toss Gently To Combine. Transfer To Serving Platter And Serve Immediately.