There are a few messy things that I don’t mind. I don’t mind my son's finger-painted food tray after he’s eaten his veggies. I don’t mind a brownie-battered countertop, knowing that warm chocolatey desserts will be enjoyed within minutes. And I definitely don’t mind having buttery and caramelized onion jam on my fingers and face if it means the chance to enjoy this sandwich. Onion jam holds a beautiful balance of sweet and savory. It may sound odd, but it’s become one of my absolute favorite sandwich ingredients. Pair it with turkey and cheese on ciabatta bread to create a warm treat when a quick lunch is needed.