"The caramelized onions in these Hawaiian Roll Sliders—layered with deli ham and melty Swiss—from Delish.com are irresistible...."
extra-virgin olive oil
large onion, halved and thinly sliced
Kosher salt
melted butter
poppy seeds
cloves garlic, minced
Worcestershire sauce
mini Hawaiian rolls
mayonnaise
honey mustard
deli sliced ham
sliced Swiss cheese