Lightly grill the sliced ham over low heat.

Spread strawberry jam on a slice of bread.

Place the grilled ham on top of the jam-covered bread.

Add a slice of cheese on top of the ham.

Cover with another slice of bread and repeat the layering process with jam, ham, and cheese.

Spread mustard sauce on the final slice of bread and cover the sandwich.

Beat the egg thoroughly and coat all six sides of the sandwich in the egg mixture.

Mix parsley flakes with breadcrumbs and coat all six sides of the sandwich evenly.

Heat oil in a pan to the right frying temperature (breadcrumbs should sink and rise immediately).

Fry the sandwich on all six sides until golden brown.

Cut the sandwich into quarters for serving.