Leftover Brisket Tacos with Pickled Onions

Brisket is one of those meats that’s worth the long cook time. Smoky, tender, and full of flavor, it’s often the star of backyard barbecues and family gatherings. But what happens when you’ve got leftover brisket? Instead of letting that delicious meat go to waste, give it new life by turning it into Leftover Brisket…