The Fat Render & Maillard Sear
Drain the cured beef and pat thoroughly dry with paper towels. In your Dutch oven, cook the diced bacon over medium-low heat until the fat renders out and the lardons turn crisp. Remove the bacon with a slotted spoon and set aside, leaving the liquid fat behind. Turn the heat up to medium-high. Working in batches, sear the pork ribs and cured beef chunks in the hot fat until deeply browned on all sides. Remove the meats and set aside with the bacon.
Rendering the bacon creates a highly flavorful cooking fat base. Searing the ribs and beef develops a rich Maillard crust that dissolves into the stew later, adding complex savory notes.
A rich, dark-brown crust on the edges of the pork ribs and a layer of browned bits (fond) stuck to the bottom of the Dutch oven.