01 -
Set oven to 175°C and allow to fully preheat.
02 -
In a large skillet over medium heat, cook the ground beef and minced onion, breaking the meat into small crumbles as it browns.
03 -
Drain excess fat. Add beef bouillon, water, brown sugar, white vinegar, and Worcestershire sauce. Stir to combine, then reduce heat and simmer until most liquid evaporates.
04 -
Horizontally slice the entire package of rolls to separate tops from bottoms, keeping both halves intact.
05 -
Arrange the bottom half of rolls in a baking dish. Spread the beef mixture evenly over the rolls, top with American cheese slices, and place one pickle chip on each portion.
06 -
In a small bowl, blend melted butter, Worcestershire sauce, brown sugar, and Dijon mustard until smooth.
07 -
Set the top half of rolls over the assembled sliders and generously brush the butter mixture across the surface.
08 -
Cover the dish and bake for 15 minutes or until golden brown and cheese is melted. Serve immediately.