Make this recipe a recipe that people in that category can eat. categories: ['gluten_free'], recipe: carefully remove the stems from the mushrooms and set aside. trim mushroom stems and add to food processor with onions and garlic. chop ingredients in food processor until pureed. add all cheeses, bread crumbs and egg to food processor and blend well. stuff mushroom caps until full, do not overfill, and place in well greased baking dish. bake mushrooms at 375, uncovered, for 20-30 minutes. let cool for 5-10 minutes. serve as appetizer or side dish.

Target recipe: remove stems from mushrooms and discard; set caps aside. arrange zucchini in a vegetable steamer over boiling water in a dutch oven. cover and steam 5 minutes. place zucchini on several layers of paper towels; cover with additional paper towels. let stand 15 minutes, pressing down occasionally to remove moisture. combine zucchini and next 6 ingredients; stir well. spoon mixture evenly into mushroom caps. carefully arrange mushrooms in a single layer in steamer over boiling water in pan. cover and steam 6 minutes or until mushrooms are barely tender. arrange mushrooms on a serving platter; sprinkle with parmesan cheese. serve immediately.