Brush the slices of bread with a little olive oil and toast on the braai until golden brown on both sides. Set aside.
For the mushrooms
In a cast iron pan directly on the braai heat a drizzle of olive oil. Add the shallots and cook until tender and starting to caramelise. Add the garlic and cook for a minute.
Add the sliced mushrooms and cook stirring occasionally, until browned all over.Season the mushrooms with salt and pepper and remove from the heat.
To finish
Place the toasted bread onto a baking tray. Spoon the mushroom mixture onto each slice and sprinkle with cheese.
Place the tray on the braai and cover with the lid for 2 minutes or until the cheese has melted.
Season with salt and pepper.
Serving
Transfer to a platter, sprinkle with fresh parsley and serve.