Remove and discard stems from mushrooms and clean caps with a damp towel to remove any dirt.
Add the drained spinach to a bowl along with the parmesan, olive oil, Italian herbs, salt, garlic, and bread crumbs.
Mix to combine the ingredients.
Spoon filling evenly into mushroom caps, lightly brush each mushroom cap with olive oil and place them on a baking sheet.
Bake for 20 minutes until mushrooms are tender.
Serve.
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Notes
Start by wiping the mushrooms gently with a damp paper towel or a soft mushroom brush to remove any dirt or debris. Do not soak the mushrooms in water, as they will absorb it and become soggy.
If the mushrooms are particularly dirty, you can gently rinse them under cool running water. Be sure to pat them dry with a paper towel after rinsing.
If the mushrooms have a lot of dirt or debris stuck in the crevices, you can gently scrape it off with a small, sharp knife or a spoon.
It's important to handle mushrooms gently, as they are delicate and can easily become bruised or damaged. Properly cleaned and handled mushrooms will have a fresher and more flavorful taste.