ABOUT THIS RECIPEBrowned edges, fresh crumbs
Chestnut mushrooms are firmer and a little earthier in flavour than white mushrooms, but they behave the same way in the pan. They’re generally available all year round. Choose mushrooms that feel dry and firm; wipe off any visible dirt with kitchen paper or a soft brush. Avoiding a rinse under the tap helps prevent extra moisture in the pan, though a quick rinse followed by thorough drying is fine if needed.
The most important step is to cook them in a large, hot frying pan. Mushrooms release moisture; if they’re crowded together, they’ll steam before they develop browned edges. So cook them in two batches, letting each batch sit for a little while before stirring. Wait until most of the moisture has evaporated and the mushrooms have browned. This browning adds depth of flavour and lays the foundation for the quick sherry sauce.
Dry sherry brings a nutty, slightly savoury flavour. Don’t use sweet sherry: it can quickly make the dish sticky. Dry vermouth or dry white wine can be used instead, though the aroma will change. Pour the sherry into the pan and use a wooden spoon to scrape up the browned bits. Let the liquid reduce before adding the butter; this keeps the sauce concentrated rather than watery.
The garlic crumbs are cooked separately so they stay crisp when served. Sourdough bread gives them a firm texture and a slight tang, but day-old farmhouse bread works too. Grind or crumble it coarsely: small crumbs brown quickly and can become dry. Add the garlic towards the end, as it can burn before the bread turns golden. Stir in the parsley after cooking for a fresh, green flavour.
Serve the mushrooms straight away, while the crumbs are still crunchy, for example alongside roast chicken, an omelette or a hearty bean salad. They also make a light lunch on toasted bread. Store any leftovers covered in the fridge and use within three days; it’s best to store the crumbs separately so they don’t go soft. Reheat the mushrooms gently in a pan and scatter the crumbs over just before serving.