Make this recipe a recipe that people in that category can eat. categories: ['low_calorie'], recipe: remove thick end of mushroom stem, leaving about 1/2 inch (1 cm) attached to cap. place, smooth side up, in large, shallow glass dish. combine oil, vinegar, thyme, salt and pepper; pour over mushrooms, turning and brushing to coat evenly. let stand for 15 minutes. reserving marinade, place mushrooms, smooth side down, on greased grill over medium-high heat; close lid and cook for 5 minutes. turn and baste with marinade; cook, covered, for about 3 minutes or until mushrooms yield to the touch when pressed. arrange parmesan over top; cook, covered, for about 2 minutes or until melted.

Target recipe: melt butter in heavy large pot over medium heat. add leeks and onion; saute' until tender, about 10 minutes. add mushrooms and saute' 5 minutes. reduce heat to low. add flour; cook until mixture is thick, stirring occasionally, about 3 minutes. gradually stir in stock and half of sherry. bring soup to a boil, stirring. reduce heat and simmer until thickened, about 10 minutes. stir in half-and-half. simmer umtil slightly thickened, about 10 minutes. stir in cayenne pepper. season to taste with white pepper and salt. stir remaining sherry into soup. bring to simmer and serve.