This recipe elevates the classic grilled cheese by incorporating sweet caramelized onions and a tangy mustard spread, paired with savory ham and melted cheese.
Heat a skillet over medium heat and add the sliced onions, brown sugar, and salt.
Stir the onions occasionally to prevent burning and ensure even caramelization.
In a small bowl, mix together the Dijon mustard, honey, and prepared horseradish.
Adjust the ratio of mustard and honey to suit your taste preferences.
Spread the mustard mixture evenly on one side of each bread slice.
Ensure the spread is evenly distributed for consistent flavor.
Layer the ham, caramelized onions, and cheese on four slices of bread, then top with the remaining bread slices.
Press the sandwiches gently to keep the layers intact.
Heat the skillet over medium heat and cook the sandwiches for 3-4 minutes on each side until golden brown and the cheese is melted.
Use a spatula to press the sandwiches lightly for a crispy texture.
Slice the sandwiches diagonally and serve warm.
Pair with a side salad or soup for a complete meal.