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Iberia · Volume 07, The Roast, the Pot and the Acorn Line

Ternasco Asado

Aragón

Ternasco asado, Aragón roast milk-and-grain-fed lamb: a roasted leg of pale pink lamb with a deep golden-brown crust in a wide terracotta cazuela, thick rounds of roasted potato in the fat below.

Illustration

Time
1 hour 45

Aragón, the IGP-protected milk-and-cereal-fed lamb, and the Casa de Ganaderos's own lineage.

As tradition built it

Serves 4. About 1 hour 45 minutes.

Ingredients

  • 1 ternasco, milk-fed from birth with straw and authorised concentrate, slaughtered at 70 to 90 days, carcass weight 8.0 to 13.0 kg, Rasa Aragonesa, Ojinegra de Teruel or Roya Bilbilitana breed
  • To taste salt
  • 100ml olive oil
  • 2 tsp, or a few sprigs rosemary
  • 1 tsp, or a few sprigs thyme
  • 4 cloves garlic
  • 1kg potatoes, cut into thick rounds
  • as available laurel
  • as available garlic oil

Method

  1. Season the ternasco simply with salt, olive oil, rosemary and thyme, pushing garlic into small cuts in the flesh: "only the spices that caress it, never the ones that cover it."
  2. Roast slowly at around 150°C, traditionally in a wood-fired oven.
  3. Roast the potatoes, cut into thick rounds, alongside in the same fat and juices, working laurel and garlic oil into the tray.

What a modern chef changes

Sous vide leg and confit potatoes

Method

  1. Sous vide the leg at a controlled 58°C for several hours before finishing, guaranteeing the pale pink doneness the IGP specification describes edge to edge.
  2. Finish hard in a Big Green Egg for genuine roasted colour and aroma without gambling that colour against overcooking.
  3. Confit the potatoes in the rendered lamb fat at a controlled low temperature rather than roasting them raw alongside from the start, giving a creamier interior before their final high-heat crisping.
  4. Blitz the pan juices, garlic and herb oil together in a high-power blender into an emulsified sauce rather than serving the juices plain.
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