Elevate your grilled cheese game with this gourmet version featuring caramelized onions and a hint of Dijon mustard.
Spread Dijon mustard on one side of each bread slice.
Use a butter knife for even spreading and to avoid tearing the bread.
Caramelize the onions in a skillet over medium heat until golden brown.
Stir occasionally to prevent burning and ensure even caramelization.
Layer cheese slices and caramelized onions on the mustard side of two bread slices.
Ensure the cheese is evenly distributed for consistent melting.
Top with the remaining bread slices, mustard side down.
Press gently to secure the layers together.
Spread butter on the outside of each sandwich.
Use softened butter for easier spreading.
Cook the sandwiches in a skillet over medium-low heat until golden brown on both sides and the cheese is melted.
Flip carefully to avoid spilling the filling.
Cut the sandwiches in half and serve warm.
Use a sharp knife for clean cuts and a neat presentation.