Marcus Wareing served up a tasty croque monsieur Gruyere cheese and ham toasted sandwich with a hot roux sauce on Simply Provence.

The ingredients are: 200g gruyère (or any hard cheese), grated, 8 slices sourdough bread, 12 slices ham and 40g butter.

For the béchamel sauce: 400ml milk, 4 tsp fresh thyme leaves, 40g butter, 4 tbsp plain flour, 2 tsp Dijon mustard, plus extra for spreading (optional), 4 tsp wholegrain mustard, 200g gruyère, grated (or any hard cheese), sea salt and freshly ground black pepper.

See recipes by Marcus in his book titled: Marcus’ Kitchen: My favourite recipes to inspire your home-cooking available from Amazon now.