Tortilla de Patatas

Directions

1. 1.

   Place potatoes in a large colander, sprinkle with 2 teaspoons salt, and toss to coat. Let stand for 30 minutes. Pat dry with paper towels.

2. 2.

   Heat oil in a large nonstick skillet over medium-high heat. Add potatoes and cook, turning occasionally, until crisp-tender, 10-15 minutes.

3. 3.

   Add onion to potatoes in skillet; cook until onion and potatoes are soft, 5-8 minutes. Using a slotted spoon, transfer mixture to a large bowl; let cool slightly. Strain oil into a heatproof bowl; set aside.

4. 4.

   Add eggs to potato mixture; season with salt. Wipe out skillet. Heat 1/4 cup reserved oil over medium-high heat (chill remaining oil for another use). Add egg mixture, arranging potatoes to submerge.

5. 5.

   Reduce heat to medium; cook tortilla until almost set (it will be slightly runny on top), 25-30 minutes. Invert onto a large plate. Slide into skillet browned side up. Cook until golden on bottom and cooked through, about 4 minutes more. Serve warm or at room temperature. Cut into wedges. DO AHEAD: Tortilla can be made 2 hours ahead. Let stand at room temperature.