1/2cupgood balsamic vinegarI used Fresina's Signature Balsamic Vinegar of Modena
1cupchunky tomato sauceI used Mama Fressina's Signature Pezzo Sauce
4slicesfresh mozzarellasliced to 1/8" or 1/4" slices)
1/2cuppesto mayonnaisemix 1/2 cup pesto with 3 tablespoons olive oil mayonnaise
4ciabatta bunssplit
Instructions
In a small saucepan, bring balsamic vinegar to a slow boil, over medium heat. Whisk constantly, until reduced by half. Reduce to low, until ready to serve. Remove from heat 15 minutes before serving and balsamic will thicken.
Preheat grill to medium-high.
Form beef into (4) 6 ounce patties, slightly larger than your bun. Make a slight indentation in the center of the burger to prevent it from doming up in the center. The indentation will rise as your burger cooks. Sprinkle burgers with salt and pepper.
Grill until golden brown and slightly charred (about 3 minutes), turning once sparingly drizzle balsamic over top cooked side (cook for 3 minutes on the other side for medium). Try not to press down on your burger with a spatula. It will cause the juices to escape and will create a dry burger!
Toast ciabatta buns.
To prepare Gourmet Caprese Burgers, spoon 1/4 cup chunky tomato sauce on bun, top with burger. Drizzle with more balsamic, add 1 slice of mozzarella cheese, spoon on 2 tablespoons of pesto mayo and top with toasted bun.