It doesn't matter if you are on a keto diet, do not eat gluten, or just want to try something different, because this onion burger is finger-licking good. We are sure you will love the combination of onions with cheese, bacon, ground meat, and a spectacular dressing. Try this burger now!Did you know? The first burger was made in 1900 in Connecticut, United States, and the creator was Louis Lassen.Click to see more burger recipes!