Preheat your oven to 375°F.
Clean mushrooms with damp cloth gently.
Remove stems and scrape out gills.
Brush caps with olive oil lightly.
Heat remaining oil in pan.
Sauté onion until soft and translucent.
Add garlic and cook one minute.
Mix in spinach until wilted completely.
Combine quinoa, cranberries, and pecans.
Add sautéed vegetables to mixture.
Stir in cheese, thyme, salt, pepper.
Fill each mushroom cap generously.
Place on foil-lined baking sheet.
Bake for 20 minutes until tender.
Serve hot with fresh herbs.