01 -
Line a baking sheet with parchment. Heat up your oven to 375°F, and set the slider bun bottoms onto the tray.
02 -
Stir seasonings into the ground beef. Shape it into 12 pieces, about 2 inches across. Cook each side for 3-4 minutes.
03 -
Mix together mustard, mayo, and ketchup in a bowl.
04 -
Put some sauce on the bottom buns. Stack cheese, patties, and pickles on top, then cover with the tops of the buns.
05 -
Pop the tray in the oven and bake for 8-10 minutes, until the cheese gets melty and the buns crisp up.