1. To make the Béchamel, fortify the milk with milk powder in a pan. In a separate pan, combine the melted butter with flour. Slowly incorporate the butter on a medium heat until it’s smooth. Add the Parmesan, mustard and salt and pepper.
2. To make the sandwich, spread each slice of bread with the Béchamel before adding some ham, red onion, Gruyère cheese, cheddar and pepper.
3. Spread the top slice of bread with butter. Heat a pan on a medium heat and place the sandwich butter side down with a little extra butter and fry on each side.
4. Remove from the heat, top with more Béchamel and cheese and place in the oven to finish cooking at 170°C for 3 – 4 minutes (fan oven).
5. Remove the fried sandwich and top with a sunny side up British Lion egg.
6. Serve with a fresh tossed mixed salad with red onion, mixed peppers, tomatoes, cucumber, radish and carrot.