Whip up these scrumptious French Dip Sandwiches in no time thanks to the Instant Pot (or slow-cooker)! They feature fork-tender shredded beef, caramelized onions, and melted cheddar (optional) on a chewy, crusty ciabatta roll. Be sure to reserve the marinade for the best part: dipping! An Underrated French Sandwich If you ask me, French dip