Carbonnade Flamande

Carbonnade flamande is beef braised for hours in Belgian brown ale with a heavy pile of onions, finished with a slice of mustard-smeared bread stirred into the sauce to thicken it. It's Flanders' answer to the wine-based stews simmering across the French border, built on the same idea of cooking a cheap cut low and slow, but built on beer because that's what the region actually brews.

What it really is

Chunks of stewing beef brown hard in fat first, then a heavy layer of sliced onions caramelizes slowly in the same pot before a dark, malty Belgian ale goes in — not a pale lager, since its sugar and bitterness are what carry the whole sauce. A bay leaf and a spoon of brown sugar round off the beer's edge, and the last move is Flemish rather than French: a slice of bread spread thickly with mustard is laid on top near the end and left to dissolve into the stew as it finishes, thickening the sauce without a separate roux.

How it's served

• Ladled deep, the sauce dark brown and glossy, the beef falling apart at the touch of a fork.
• With a mound of frites and a bowl of mayonnaise, almost never rice or pasta.
• Sometimes with apple compote or sliced pickled gherkins alongside, to cut the richness.

How to write it on the menu

• Name the beer it's braised in — a Flemish brown ale carries more weight on a menu than "beer-braised beef."
• Mention the bread-and-mustard thickening; it explains the sauce's dark colour and body, and tells a guest with a wheat or mustard allergy exactly what to ask about.
• Pair it with frites in the description itself, not as a generic side — that's how the dish is actually eaten.