First of all, clean your mushrooms with a pastry brush, working it into the little holes of the mushroom cap.
If you want to, you can now soak your mushrooms in lightly salted water for 5 minutes to make sure any possible critters are released.
Now cut your mushrooms in half lengthways and either pat them dry or use a salad spinner to dry them.
Place them into your egg bowl and mix around until they are all well coated.
Gently heat your butter in your frying pan and add your chopped garlic, allowing to saute for a couple of minutes over a low to medium heat.
Meanwhile sprinkle the coarse flour breadcrumbs over your mushrooms and mix around until they are all coated.
Now add to your frying pan and cook gently for 10 minutes, flipping once, until they are golden and crisp.
Season with salt and pepper (and chilli if using) and then remove from the heat.
Serve immediately either on their own as light meal or as an accompaniment to a larger breakfast.