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What: The British like things on toast, right? Toasties, or toasted sandwiches, are merely an extension of that love, and they are big in this country—particularly when filled with cheese, making it a cheese toastie and quite the same as what many of us would call “grilled cheese”: a hot, gooey cheese sandwich. It’s as basic as basic gets, but that doesn’t mean this classic comfort food can’t be elevated by top-notch local ingredients.

Where: Long a beloved fixture of Borough Market, dairy stall Kappacasein (1 Voyager Railway Arches) was controversially evicted in spring 2011, along with several other vendors—all of which now call a stretch of railway arches in Bermondsey their trading home. Informally called the Maltby Street market (despite extending well beyond Maltby St.), they and other area producers have quickly gained a rep as a less touristy, less chaotic version of Borough Market.

When: Kappacasein is open Fri, 11am-2pm; Sat, 9am-3pm. If you’re hoping to visit other Maltby Street traders, come on Saturday.

Good to know: Besides this sandwich, our favorite two reasons to visit the Maltby Street market are St. John Bakery—bread supplier for all of Fergus Henderson’s St. John restaurants—and the excellent Kernel Brewery, producer of small-batch artisanal beers (see also: Local craft beer). Like the other vendors, both are open to the public on Saturday mornings.

Order: The toasted cheese sandwich (£5), famously called “the platonic ideal of grilled cheese” by superfan-food writer Ruth Reichl, is a gooey affair of shredded Montgomery’s cheddar—the king of British cheddars: a nutty, earthy cheese handmade in Somerset—with chopped leeks, onions, and garlic, all melted together between slices of sourdough bread baked by Poilâne, a world-renowned Parisian bakery with a London outlet. (The sandwich also uses some Ogleshield, a deliciously pungent cheese likewise produced by Somerset’s Montgomery family, and occasionally some Devon-produced Quickes cheddar or Bermondsey hard-pressed cheese, which Kappacasein produces in London.) Crunchy, melty, and deeply flavorful, it’s living, oozing proof that simplicity triumphs when high-quality ingredients are involved.

The only other item sold by Kappacasein is the raclette, a Swiss dish of boiled new potatoes and spicy baby gherkins covered in melted Ogleshield. We’ve heard very good things.

See also: Local cheese