Gulungan Roti Panggang Perancis Ham dan Keju

Bahan-bahan (2 porsi)

• 6 slices fresh sandwich bread ((I used white, but you could use wholemeal, wholegrain etc) (see notes))
• 3 slices of melting cheese
• 1 tbsp butter
• 1 egg ((large))
• 2 tbsp milk ((full cream or low fat))
• 2 small slices of ham ((around 50g / 1.5 oz))
• Pinch of salt