Caramelized Onion Mushroom Cheeseburger

By: Tara Noland from noshingwiththenolands.com

"Caramelized Onion Mushroom Cheeseburger is an ultimate burger with caramelized onion, sauteed mushrooms and a mix of Italian sausage and lean beef. Add your favorite toppings and serve on a ciabatta bun!"