Argolida Slow-Baked Lamb with Potatoes (Bogana)

Bogana is the Argolida version of the roast that comes out for a feast day, and it is named for the pot rather than the meat. A gastra is a heavy lidded vessel that used to be buried in the embers of a hearth or pushed into a cooling wood oven, and everything about the dish assumes that kind of long, gentle, sealed heat.

What sets it apart from every other Greek lamb-and-potato tray is the fat. Butter made from sheep's or goat's milk goes in alongside the olive oil, and it gives bogana a rounder, slightly farmyard richness that Peloponnesians will tell you is the whole point of the dish.

The potatoes go in whole and small, not cut into wedges, so they steam through in the lamb juices instead of crisping. After three hours under a lid they are saturated with tomato and meat fat, and in many households they are the part people fight over.

Key preparation steps

1. Stud the lamb with garlic and season it heavily.
2. Sit it in a heavy pot with whole small potatoes and tomato.
3. Add sheep butter and olive oil, cover tightly.
4. Bake low and slow for about three hours, uncovering at the end.

What cut of lamb should I use?

A whole bone-in leg is traditional, and the bone matters: it holds the meat together through hours of cooking and gives the juices in the bottom of the pot their body. Shoulder works just as well and is more forgiving still, because it carries more fat.

Young milk-fed lamb is the festive choice in Argolida and cooks faster. Older lamb needs the full three hours and rewards it. What does not work is anything boneless and lean, which dries out long before the potatoes are ready.

Why is the pot covered for most of the cooking?

Covered cooking traps steam, and steam is what breaks down the connective tissue in the leg without drying the surface. For the first two and a half hours nothing should be browning, only softening.

The lid comes off for the last half hour. That is when the surface colours, the juices reduce and the potatoes take on a little glaze. Do it in the other order and you get a browned crust over meat that is still tough.

Does it have to be sheep butter?

It is what makes bogana taste like bogana rather than a generic roast. Sheep and goat butter is tangier and more assertive than cow butter, and against three hours of lamb and tomato you can genuinely taste which one went in.

If you cannot find it, use ordinary butter and accept that the dish is a shade more neutral. Greek delis and Cypriot grocers usually stock sheep butter, sometimes labelled as galaktoboutyro provio.

How do I stop the potatoes falling apart?

Choose small waxy potatoes and leave them whole and unpeeled, or peeled but uncut. A cut surface leaches starch and turns to mush over three hours, while a whole potato holds while it absorbs.

Tuck them around the lamb rather than under it, so they sit in liquid rather than being crushed by the weight of the joint. If they are large, halve them and add them an hour into the cook rather than at the start.

What matters in this dish