Prepare the crostini by slicing a baguette into thin slices and placing it on a baking sheet. Place into the oven for 3-4 minutes, or until golden brown and crisp.
Add some cheese slices to the top of each crostini and bake for another 1-2 minutes, or until the cheese is melted. Remove from oven.
Cook the mushrooms while the baguette slices are baking, heat the butter in a large skillet over medium-high heat. Add the sliced cremini and morel mushrooms with the full sprig of thyme to the HOT pan and let them sit for 2 minutes without stirring; toss and continue to cook for another 2-3 minutes or until golden brown.
Add the minced garlic and cook, stirring constantly, for 1 minute. Remove from the heat. Season with sea salt and freshly cracked pepper, to taste.
To serve, spoon the mushrooms evenly on top of each crostini then sprinkle with fresh parsley. Serve immediately. Enjoy.