Prepare the mushrooms: Clean and remove the stems from the mushrooms. Season the inside with a little salt and pepper.
Stuff the mushrooms: Fill each mushroom cap with a small amount of shredded Irish cheddar cheese.
Wrap the mushrooms: Take half a slice of bacon and wrap it around each stuffed mushroom. Secure the bacon with a toothpick.
Bake the mushrooms: Place the bacon-wrapped mushrooms on a baking sheet lined with parchment paper. Bake in the preheated oven for 20-25 minutes, or until the bacon is crispy and the cheese is melted and bubbly.
Garnish and serve: Once cooked, remove from the oven and sprinkle with freshly chopped parsley if desired. Serve hot and enjoy!