
This rustic Spanish egg-and-potato dish is the kind of recipe that looks impressive but relies entirely on humble, wholesome ingredients you likely already have on hand. Layers of silky Yukon Gold potatoes and sweet slow-cooked onion are bound together with beaten eggs and a generous pour of good olive oil, creating something that's rich, satisfying, and deeply comforting. The slow simmer in olive oil is what makes the potatoes so impossibly tender before they ever meet the eggs — it's a technique that rewards patience and delivers serious flavor. Because every single ingredient here is straightforward and naturally free from tree nuts, there's no label-reading anxiety or ingredient-swapping required. The dramatic flip is the only moment that asks for a little confidence, but once you nail it, you'll want to make this on repeat. Serve it warm, at room temperature, or even cold the next day — it holds up beautifully and tastes just as good sliced into wedges for a casual dinner as it does cut into small squares for a party spread.
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Heat the olive oil in a 10-inch nonstick skillet over medium-low heat until it shimmers. Add the potato slices and onion, season with ½ tsp of the salt, and stir gently to coat. Cook, turning the potatoes occasionally with a slotted spoon, until the potatoes are completely tender and yield easily when pressed with the back of a spoon, about 20–25 minutes. They should be soft but not browned.
Use a slotted spoon to transfer the potatoes and onion to a large mixing bowl, leaving as much oil behind in the skillet as possible. Reserve 2 tbsp of the cooking oil in the skillet and discard the rest (or save for another use).
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