In a medium-sized saucepan on medium-low heat slowly cook the vinegar and brown sugar until reduced by about 75 percent becoming a glaze.
Drizzle 2 tablespoons of the balsamic glaze over your Mozzarella Caprese Mushrooms serve and enjoy!
Preheat your oven to 350°F.
Place the portobello caps stem side down on a baking sheet (lined with a MagicalButter baking mat if available). Drizzle them generously with Magical Olive Oil; flip; and repeat with the reverse side of the caps.
Fill the inverted caps with mozzarella tomato halves chives Parmesan garlic and basil. Salt and pepper to taste.