Tortilla de Patatas, 12 servings
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Potatoes and Onion · Step 1 of 5
Peel 2040 g Yukon Gold potatoes, cut them into quarters and slice thinly. Keep the slices in a bowl of cold water so they do not darken.
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Potatoes and Onion · Step 2 of 5
Heat 590 ml extra virgin olive oil in a medium pot to 93 °C.
93 °C
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Potatoes and Onion · Step 3 of 5
Drain the potatoes and pat them dry with paper towels. Slide them into the oil and cook, stirring now and then, for about 25 min, until soft but not coloured.
a knife slides through a slice easily
pale gold at most, never brown or crisp
93 °C
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Potatoes and Onion · Step 4 of 5
After the potatoes have had 10 min, spoon 130 ml extra virgin olive oil of the hot oil into a small frying pan over medium-low heat. Add 1 ½ small yellow onions and cook, stirring often, for about 15 min, until soft and golden. Do not let it burn. Drain on a plate lined with paper towels.
soft, sweet and evenly golden
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Potatoes and Onion · Step 5 of 5
Lift the potatoes out with a slotted spoon onto a tray lined with paper towels. Keep the oil warm over very low heat.
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Tortilla · Step 1 of 7
Whisk 18 eggs, 6 egg yolks and 30 ml kosher salt together in a mixing bowl.
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Tortilla · Step 2 of 7
Fold in the warm potatoes and onion with a spatula, mixing until the eggs and potatoes turn creamy. Break up some of the potato as you go, but stop well short of mash.
a thick, creamy, pale yellow mixture with pieces of potato still visible
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Tortilla · Step 3 of 7
Heat 16 ml extra virgin olive oil of the reserved oil in the non-stick pan over medium heat until it just begins to smoke. Pour in the egg mixture and take the pan off the heat. Shake it in a circular motion for about 15 s to spread the mixture and stop it sticking.
the oil shimmers and gives off the first wisp of smoke
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Tortilla · Step 4 of 7
Return the pan to low heat and cook for 3 min to 4 min, until the edges start to set but the centre is still loose and runny.
the edge is set and lightly golden
the middle still wobbles
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Tortilla · Step 5 of 7
Put the plate upside down over the pan, turn pan and plate over together and lift the pan off, leaving the tortilla on the plate.
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Tortilla · Step 6 of 7
Put the pan back on the heat with 16 ml extra virgin olive oil more of the oil and heat until it just smokes. Slide the tortilla in, runny side down, swirl the pan for 10 s and cook for 45 s to 1 min, until the edges have set.
the edges are firm and golden
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Tortilla · Step 7 of 7
Slide the tortilla onto a serving plate and rest it for a few minutes. Season with flaky sea salt and cut into wedges.
golden and firm outside, soft and creamy inside