First Step: Prepare Your Oven and Mushrooms
Preheat your oven to 400°F (200°C). Gently clean portobello mushroom caps using a damp cloth to remove dirt. Remove the stems and set mushrooms aside on a baking sheet lined with parchment paper.

Second Step: Make Garlic Butter Mixture
In a small pan, melt butter and gently sauté crushed garlic until fragrant but not browned. Stir in chopped parsley and set aside. Brush each mushroom cap with this garlic butter mixture to infuse rich, savory flavor before baking.

Third Step: Prepare Caprese Stuffing
In a bowl, combine halved cherry tomatoes, diced fresh mozzarella (or sliced mozzarella balls), and chopped basil. Drizzle with olive oil, add salt and pepper, then toss gently to combine, ensuring a harmonious blend of fresh ingredients.

Fourth Step: Stuff the Mushrooms
Spoon the prepared caprese mixture generously into each garlic butter-coated portobello cap. Arrange the filling so it slightly mounds but does not spill over the edges.

Fifth Step: Roast and Finish
Drizzle a little more olive oil over the stuffed mushrooms and place the tray in the preheated oven. Roast for 15 to 20 minutes, or until mushrooms are tender and cheese is melted with light golden spots.

Final Step: Garnish and Serve
Remove mushrooms from the oven and let them rest for a couple of minutes. Drizzle with balsamic glaze, sprinkle additional fresh basil or parsley, and season with salt as needed. Serve warm as an elegant appetizer or satisfying main dish.