Ingredients

  • 1/4 cup extra-virgin olive oil
  • 1 large Spanish onion, peeled and finely diced
  • Coarse salt
  • 1 leek (white part only), washed well and thinly sliced crosswise
  • Freshly ground pepper
  • 1 tablespoon unsalted butter, at room temperature
  • 1 cup all-purpose flour
  • 3/4 teaspoon baking powder
  • 7 ounces Greek yogurt
  • 11 ounces feta cheese, crumbled
  • 1 cup sauteed spinach, squeezed very dry and chopped
  • 1/4 cup chopped fresh dill
  • 3 large eggs, at room temperature, beaten

Method

  • 1. Heat the oil in a large skillet over medium-low heat. Add the onion and a pinch of salt. Cover and simmer, stirring occasionally, 6 minutes. Add the leek, season with more salt and the pepper, and continue to cook, stirring occasionally, until the vegetables are very soft and translucent, about 8 minutes. Transfer to a bowl and set in an ice bath to cool.
  • 2. Meanwhile, preheat oven to 325°F.
  • 3. Generously coat an 8-inch round nonstick springform pan with butter and chill.
  • 4. Sift together the flour and baking powder in a medium bowl; set aside.
  • 5. Combine the yogurt, feta, onion-and-leek mixture, spinach, and dill in a large bowl. Add the eggs and stir to combine. Using a rubber spatula, gently stir in the flour mixture and season with more salt and pepper. Pour into the prepared pan, gently tapping the sides to level the top.
  • 6. Bake for 30 minutes. Increase heat to 425°F and bake until golden brown and set in the center, about 10 minutes more.
  • 7. Transfer to a wire rack and cool for 10 minutes before unmolding.
  • 8. Cut into wedges and serve.