Make as many as you want
These are very, very good. When my mother told me this was how Nanny made them, I was sure she was wrong. She wasn't.
I used to use seasoned bread crumbs for this but stopped when I read the list of ingredients on regular brands found in the supermarket. I avoid food with trans fat (hydrogenated oil) and high fructose corn syrup, but if you find a brand of seasoned bread crumbs that you like that doesn’t have junk in it, you can use it here.
Nanny's Stuffed Mushrooms
Large cultivated mushrooms (just plain old white mushrooms) - If you find the really large ones that are packaged specifically for stuffing, get them.
Salt and pepper
Pinch of dried oregano (optional - I don't use this, but Nanny and Mom did )
Preheat oven to 350 degrees. Remove stems from mushrooms. Coarsely chop stems and place in a bowl with breadcrumbs (about a quarter of a cup for a large package of mushrooms). Add a small amount of salt and pepper to taste and a little dried oregano if you want to use it.
Do not add any liquid ingredients.
Put mushroom caps open end up in a baking pan. Fill indentations with stuffing mixture, which is totally dry and will fall out a little. Can be prepared in advance to this point.
Drizzle (this means not a lot) with olive oil, and bake for 20 minutes or until sizzling and slightly brown. The cook gets to eat all the little crunchy parts in the bottom of the pan.