Brisket sandwiches are best kept simple. All you need is your favorite hamburger buns, pickles, red onion, and some great brisket. For the best result, consider wet aging your brisket. To start, purchase a brisket flat from a local butcher that comes in a vacuum-sealed package with the kill date on the label. Meat purchased at a grocery store will only have a sell-by date which isn’t what you want. Then, bring it home, ensure that no air bubbles are present in the package, and leave it on the lowest shelf of your fridge in an area where it won’t be disturbed to wet age for 30-45 days from the kill date, not the date you brought it home.