Step 1

Lightly whisk egg, milk and a generous pinch of salt in a flat bowl.

Step 2

Spread 2 slices of bread with mayonnaise.

Step 3

Top with ham, then cheese, then sandwich with remaining slices of bread. Press down firmly.

Step 4

Melt butter in a skillet over medium heat.

Step 5

Dip each side of the sandwiches briefly in the egg mixture, then place in skillet.

Step 6

Cook the first side, pressing down with an egg flip, for 3 minutes or until deep golden brown.

Step 7

Flip and cook the other side for 3 minutes, pressing down firmly with the egg flip, until golden brown and the cheese is melted.

Step 8

Serve immediately, while hot!