Preheat the oven to 350°F and grease a baking sheet. Set aside.
Using a damp paper towel, gently clean mushrooms. Remove the stems and gills and finely chop them.
Heat oil in a pan over medium heat. Add diced onion, minced garlic, and chopped mushroom stems/gills. Sauté for 2 minutes. Remove from heat.
In a bowl, combine sautéed vegetables with oregano, basil, thyme, cream cheese, sour cream, mozzarella cheese, and crab meat. Season with salt and pepper.
Spoon the crab mixture into mushroom caps and place on the prepared baking sheet.
Sprinkle each mushroom with parmesan cheese.
Bake for 30 minutes, or until the tops are golden and bubbly.
Remove from oven and serve warm. Garnish with chopped parsley if desired.
Notes
These stuffed mushrooms make a delicious appetizer for any gathering.