In keeping with my love of a) putting foods inside of other foods and b) using vegetables to make my favorite meals non-gluten :
Grated Parmesan Or Mozzarella Cheese
Garlic Salt And Pepper, To Taste
Finely Chopped Red Onion
I was supposed to use big mushroom, so that the stuff would actually fit inside, but I used these baby ones instead, because that’s what I had. So I’ll pretend I was going for “bite size” — like appetizers.
Preheat oven to 350ºF.
Wash mushrooms with a damp cloth and remove stems.
In a small bowl, stir basil, garlic salt and pepper together until combined. Stir in remaining ingredients, excluding the mushrooms.
Spoon into prepared mushroom caps by the heaping teaspoonful. Sprinkle Parmesan.
Bake 20 minutes. After 20 minutes, switch oven from bake to broil and brown the tops of each mushroom.