Whisk the egg, Parmesan, paprika, mustard, Worcestershire sauce and milk together in a shallow dish that the slices of bread will fit in.

Sit the bread in this mixture for about 2 minutes each side, pressing down on it every now and again. You want the slices to be soaked through and softened, but not falling to pieces. Spoon any remaining egg mixture over.

When the bread is soaked, warm the butter and oil in a frying pan over a medium heat. Once the butter is beginning to bubble, fry the bread for about 2 minutes each side – keep a good eye on it – until it is cooked through with patches of golden-brown on the surface.