These Gruyere and Mushroom Sandwich Bites are the perfect gourmet finger food. These mini vegetarian party snacks are simple to make and are great for a crowd at parties as everyone loves grilled cheese, and mushroom melts are always a big hit! Or instead of as a finger food, why not try serving them as an easy appetizer. And for the foodies in your life make them fancy with the optional black truffle infused olive oil. #partyfood #grilledcheese