It's British Sandwich Week and North London's Max Halley has created a 'wundersarnie' stuffed with home-made German sausage inspired by a Black Forest gin.

Halley, who opened Max's Sandwich Shop in Crouch Hill in 2014 has taken inspiration from the botanicals around the Monkey 47 distillery for his epic wurst.

"The Wunder-Sarnie is a collection of the best things ever!" he said.

"A brioche bun and inside it an enormous sausage that is made with many of the Monkey 47 botanicals in it, sauerkraut, lingonberry mustard, crispy onions, and Black Forest ham. In nine years, we have never had a sausage on the menu! But now we are now putting one on."

Ham & High: The wundersarnie includes black forest ham, lingoberry mustard and sauerkraut with onionsThe wundersarnie includes black forest ham, lingoberry mustard and sauerkraut with onions (Image: Monkey 47 Gin)

Sadly the quirky sarnie is not on sale at Halley's shop but he will be serving them for one day in central London on June 1 at Leake Street Arches between 4pm-8pm. Expect and Oompah band, and Germanic fun alongside Gin&Tonics topped with ham and a pickle.

Thereafter customers can buy the sausage at his shop and perhaps make the sandwich at home. Halley is renowned as a sandwich revolutionary who has featured on Channel 4's Sunday Brunch and as a guest chef on ITV's This Morning. His book Max's Sandwich Book was a Sunday Times bestseller.

His bread-based snacks include the Et Tu Brute? with chicken, pickled grape and tarragon salsa, baby gem, anchovy, mayo and garlic croutons, but he says the Ham, egg 'n' chips; with piccalilli, malt vinegar, shoestring fries, and ham hock is "the signature sandwich of the shop."

Ham & High: Max Halley celebrates the success of his new sandwich the 'wundersarnie'Max Halley celebrates the success of his new sandwich the 'wundersarnie' (Image: Courtesy of Monkey 47)

"The chips are what the French called ‘Allumette’ – which means match in French, because they are the same dimension as a matchstick."

As for why the humble sandwich - a snack said to have been invented by Sir John Montagu the fourth Earl of Sandwich so that he wouldn't have to leave the gambling table to eat -  is perennially popular, he said: "You can pick them up. They are great when they’re really simple, and great when they’re really complicated. As long as you think about what goes in between those two bits of bread, the entire world’s cuisine is open to you!"