Caramelised Onion Grilled Cheese

1: Add 1 tablespoon of butter to a pan on low-medium heat.

2: Once melted, add the sliced onion and cook for 50-60 minutes, stirring frequently until dark golden brown.

3: If necessary, add splashes of water to prevent burning and to deglaze the pan.

4: Stir in the sugar and balsamic vinegar, then continue cooking for another 5 minutes.

5: Spread mayonnaise over one side of each slice of bread.

6: Place bread slices, mayonnaise side down, in a pan on medium heat.

7: Spread mustard over one slice, then add cheese evenly over both slices.

8: Add caramelised onion over one slice and flip the other slice on top.

9: Cook for 3-5 minutes or until golden brown, pressing down with a spatula.

10: Flip the sandwich and cook for another 3-5 minutes until the bread is golden brown and the cheese is melted.

11: Remove from the pan, slice, and serve.