Croque Monsieur

Put the Swiss cheese, egg yolk, Worcestershire sauce, mustard and cayenne pepper in a food processor fitted with the steel blade.

Process until the mixture is smooth. Taste and season with salt.

If the cheese mixture is too thick to spread easily, thin it with a little cream.

Spread the cheese mixture over one side of each slice of bread.

Arrange the ham over the cheese on half of the bread slices.

Place the remaining bread slices over the ham, cheese-side down, and press the sandwiches firmly.

Film the bottom of a heavy skillet with olive oil and heat over medium-high heat until very hot.

Add as many sandwiches as will fit in the pan and fry, turning once, until golden brown and crisp on both sides.

Repeat with the remaining sandwiches, adding more olive oil to the pan if needed.

Cut the croque monsieur sandwiches in half and serve hot, wrapped in a paper napkin.