While the recipe has you spread the cheese first then top with the mushrooms, you can definitely mix them together before spreading onto the tost. This would also be a great way to serve this at a breakfast or brunch event. Mix together the topping and provide it alongside a variety of bread for toasting. Note: When doing this instead of separating the two ingredients on the toast, you'll want to make sure you are only adding the vegetables and not any extra cooking liquid remaining in the skillet.