Depending what you have lurking in the bottom of the fridge, add anything else that takes your fancy such as;
Sliced fresh chilli pepper
1tspof Soy Sauce or Balsamic vinegar
Chopped spring onion
Chopped avocadotomatoes or onions
Chopped chicken or meat
Fresh herbs such as basil or corriander
Wipe any dirt away with a damp cloth or small brush. Snap off the stalk and brush the outside of each mushroom with some melted butter or oil and pop, oil side down, in an oven proof dish. Chop the stalk up and return it to the centre of the mushroom.
In a basic garlic mushroom, add add the chopped garlic and a small knob of butter or drizzle of oil.
Bake in a moderate oven for 20 minutes, or until the mushroom looks dark, juicy and cooked.