Making Caprese Stuffed Garlic Butter Portobellos is straightforward. Follow these simple steps to create this delightful dish:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Clean the Mushrooms: Gently wipe the portobello caps with a damp cloth to remove any dirt. Remove the stems and scrape out the gills using a spoon.
3. Prepare Garlic Butter: In a small saucepan, melt the unsalted butter over medium heat. Add minced garlic and sauté for 1-2 minutes until fragrant. Remove from heat.
4. Mix Filling: In a mixing bowl, combine the diced mozzarella, halved cherry tomatoes, chopped basil, salt, and pepper. Stir in half of the prepared garlic butter for extra flavor.
5. Stuff the Mushrooms: Place the cleaned portobello caps on a baking sheet. Spoon the filling into each cap, packing it gently but generously.
6. Brush with Garlic Butter: Drizzle the remaining garlic butter over the stuffed mushrooms, ensuring they are well-coated.
7. Bake: Bake in the preheated oven for 20-25 minutes, or until the mushrooms are tender and the cheese is melted and bubbly.
8. Drizzle Balsamic Glaze: If desired, drizzle balsamic glaze over the stuffed mushrooms before serving for added flavor.
9. Serve Hot: Remove from the oven and let cool for a few minutes. Serve warm, garnished with extra basil if desired.

These steps will guide you in creating your Caprese Stuffed Garlic Butter Portobellos effortlessly and deliciously!