Wash and dry the mushrooms well, removing their stems and placing them top side down on a baking sheet that's been drizzled with olive oil.
Add the cream cheese, mozzarella, and Parmesan cheese to a large bowl, along with the parsley, basil, oregano, thyme, garlic, and salt and pepper, mixing well to combine.
Add the chopped tomatoes (drain them first!!) stirring the mixture gently just until combined.
Spoon the mixture into the mushrooms until they're fully stuffed.
Sprinkle the remaining Parmesan cheese on top and bake at 350 degrees Fahrenheit for about 18-20 minutes until the tops have browned slightly.
Garnish with fresh parsley after baking and enjoy immediately.