Creating Portobello Filled Caprese Bites is a straightforward process. Follow these simple steps:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Mushrooms: Clean the portobello mushrooms with a damp cloth. Remove the stems and carefully scoop out the gills using a spoon.
3. Season the Mushrooms: Brush the outside of the mushrooms with olive oil. Season the insides with salt and pepper.
4. Mix the Filling: In a bowl, combine the diced mozzarella cheese, diced tomatoes, chopped basil, and balsamic glaze. Mix until well combined.
5. Fill the Mushrooms: Spoon the cheese and tomato mixture into each portobello cap generously.
6. Bake the Mushrooms: Place the filled mushrooms on a baking sheet and bake in the preheated oven for 25-30 minutes, or until the cheese is melted and bubbly.
7. Garnish and Serve: Once out of the oven, drizzle with additional balsamic glaze and sprinkle with red pepper flakes if desired.
8. Cool Slightly: Allow the bites to cool for a few minutes before serving to ensure they hold their shape.

These steps will guide you in creating these incredible Portobello Filled Caprese Bites effortlessly.