Tender, fall-apart chuck roast slow cooked with buttery onions and savory au jus, then piled onto toasted buns with melty provolone. And of course, you have to serve them with that rich au jus for dipping!
The Buttery Spoon · https://www.thebutteryspoon.com/2026/09/28/crockpot-french-onion-dip-sandwiches/
