In a large skillet over medium heat, add the minced meat and onions and brown the minced meat, breaking up the meat well as it cooks.
If necessary, strain the fat and then add the bouillon cube, water, brown sugar, apple cider vinegar and Worcestershire sauce. Bring to a boil, then reduce the heat and simmer until the liquid has evaporated.
Place the base of the sandwiches in a baking dish and sprinkle with the beef mixture.Arrange the marinated cucumbers on top, then the cheese slices and the tops of the rolls.
In a small bowl, mix the melted butter, brown sugar, Dijon mustard and Worcestershire sauce and brush on the rolls.
Cover the baking dish with cling film and bake in the oven for 25 minutes. Recognize!