Clean the mushrooms and cut up the ones that are too big so that all mushrooms are of similar sizes. In a large pan, stir the mushrooms in butter for about 3 minutes until golden.
Mix the bacon, garlic, breadcrumbs, parsley, and seasonings.
Sprinkle the mixture over the mushrooms.
Keep cooking on low heat for 10 minutes, stirring regularly.
Add the lemon juice and give it a quick stir.
Serve immediately, garnished with lemon slices and parsley.