Instructions: Put the blueberries and balsamic vinegar in a small saucepan and mix them together. Slowly stir the ingredients together over low heat until the blueberries begin to break down and the mixture gets a little thicker. That's how long it should take. Take it off the heat and set it aside. Each piece of bread should have butter on one side. Spread the blueberry mixture, shredded mozzarella cheese, and crumbled blue cheese on the side of one slice of bread that hasn't been buttered. If you want, you can add some fresh basil leaves and season with salt and pepper. The buttered side of the second slice of bread should face outward. Set a pan or griddle over medium heat. Carefully put the sandwich in the pan and cook for three to four minutes on each side, until the bread is golden brown and the cheese melts. First, take the Balsamic Blueberry Grilled Cheese out of the pan and let it cool for one minute. Then, cut it in half. Enjoy your tasty Balsamic Blueberry Grilled Cheese while it's still hot!
