Healthy, 21 Day Fix approved French Onion Chicken

Healthy, 21 Day Fix approved French Onion Chicken: this was okay, didn't taste like French onion soup. I used provolone cheese, subbed sherry for balsamic vinegar since that's what I use in my French onion soup, and grilled the chicken. Cooked onions for an hour and they never caramelized. I really wanted to like this so I may try it again.