Follow these simple steps to create your wonderful Portobello Mushrooms Filled with Caprese Delight:

1. Preheat Oven: Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.

2. Prep Mushrooms: Clean the Portobello mushrooms with a damp cloth, removing any debris. Carefully remove the stems and gills to create room for filling.

3. Prepare Filling: In a medium bowl, combine the halved cherry tomatoes, mozzarella balls, and chopped basil. Drizzle with olive oil and balsamic vinegar (if using). Season with salt and pepper, mixing gently to combine.

4. Stuff Mushrooms: Place the mushrooms on the prepared baking sheet, gill side up. Generously fill each mushroom cap with the tomato and mozzarella mixture.

5. Bake: Place the baking sheet in the preheated oven and bake for 15-20 minutes or until the mushrooms are tender and the cheese is melted and bubbly.