Gigot à la Boulangère

Gigot à la boulangère (leg of lamb with baker's potatoes) teaches timing: the joint must brown before the vegetables arrive, then its fat becomes their seasoning and cooking liquor. That is the one true thing to know before touching the pan. Put everything in together and the lamb pales while the onions weep; stagger them, and one dish gives you bronzed meat, sweet onions, and potatoes with crisp rims and soft centers.

The formula assumed a large joint, an earthenware dish, and a cook who knew the oven by feel. For four, its four onions and eight potatoes become two and four around a small bone-in leg, a direct half-scale that preserves the generous proportion. A heavy 35 × 25 cm roasting dish and an instant-read thermometer are the honest home equivalents; asking the butcher to remove the pelvis bone and shorten the shank replaces the boning and sawing that belong at the block, not your supper table. There is no saucier, no stockpot, and no separate sauce because the lamb's drippings are the sauce. One cook, one stove, one evening.

The butchery is scaffolding and can go to the butcher. Browning the lamb on both sides, coloring the onions in real butter, adding the half-inch potato rounds for the final portion of roasting, and serving from the cooking dish are the recipe itself, so they stay. Guard the browning first; if the potatoes lag behind the meat, lift the lamb to rest and let the dish carry on. Ça se rattrape.