Mushroom Madness - Dkp

This isn’t your diner mushroom melt. The mushrooms sit in a sharp vinaigrette with Dijon, Worcestershire, lemon juice, garlic and a shot of hot sauce before they ever touch the pan, which seasons them all the way through instead of just on the surface. Thinly sliced red onion joins the marinade so it softens and sweetens as the sandwiches bake.

The curry-mustard sauce is the surprise. It’s a classic bechamel built with butter and flour, loosened with milk and chicken broth, then laced with sherry, Dijon and curry powder. That curry note threads everything together and turns ordinary mushrooms on toast into something you’ll remember.

Built on rye bread and blanketed with shredded Swiss, these bake until the cheese blisters and the edges crisp. Serve open-face with a fork and knife, they’re too generous for a handheld.

Chef Tips

• Use a mix of mushrooms if you can, cremini and shiitake add depth that plain button mushrooms lack
• Let the mushrooms sit in the marinade at least 15 minutes so they release some liquid and absorb the seasonings
• Cook the flour and butter roux a full two minutes, untoasted flour leaves the sauce tasting pasty
• Toast the rye slices lightly before topping, this stops the bread from turning soggy under the wet mushroom load
• Swiss cheese melts best when shredded fresh off the block, pre-shredded versions contain anti-caking starch that resists melting

Variations

• Swap Swiss for Gruyere or Emmental for a nuttier, more complex finish
• Add crisp-cooked bacon crumbles under the cheese for a smoky upgrade
• Use sourdough instead of rye for a tangier, chewier base