Active Time

　　30 min

　　Total Time

　　1 1/2 hr

　　Rest assured that your guests won't leave your party feeling hungry — these omeletlike hors d'oeuvres, not to be confused with Mexican flour tortillas, are as hearty as they are delicious.

　　

Ingredients

Makes 64 hors d'oeuvres

　　1 bunch scallions

　　2 tablespoons extra-virgin olive oil

　　2 medium onions, chopped (1 1/2 cups)

　　4 garlic cloves, finely chopped

　　1 1/4 teaspoons salt

　　1/2 teaspoon black pepper

　　6 oz Spanish chorizo (cured spiced pork sausage), cut into 1/4-inch dice

　　1 1/2 lb yellow-fleshed potatoes such as Yukon Gold (about 4 medium), peeled and cut into 1/4-inch dice

　　9 large eggs

　　3/4 cup sour cream

　　5 oz Manchego or white Cheddar, coarsely grated (2 cups)

　　

Step 1

Put oven rack in middle position and preheat oven to 400°F. Lightly oil a 13- by 9-inch baking pan or dish.

　　

Step 2

Finely chop white and green parts of scallions and reserve separately.

　　

Step 3

Heat oil in a 12-inch heavy skillet over moderately high heat until hot but not smoking, then cook onions, garlic, white parts of scallions, 3/4 teaspoon salt, and 1/4 teaspoon pepper, stirring occasionally, until onions are golden, about 6 minutes. Add chorizo and cook, stirring occasionally, until just beginning to brown and release oil, about 4 minutes. Reduce heat to moderate, then stir in potatoes and cover skillet. Cook, stirring occasionally, until potatoes are tender, about 10 minutes. Transfer mixture to a large bowl and cool slightly.

　　

Step 4

Whisk together eggs, sour cream, cheese, scallion greens, and remaining 1/2 teaspoon salt and 1/4 teaspoon pepper in a bowl, then pour into baking pan. Sprinkle potato mixture over eggs (some potatoes will stick out). Bake until custard is set, about 20 minutes. Cool in pan on a rack to warm or room temperature. Trim 1/2 inch off each side, then cut tortilla into 1 1/2- by 1-inch rectangles.

　　Cooks' note:

　　Tortilla can be baked 1 day ahead and cooled completely, uncovered, then chilled, covered. Cut into squares, then bring to room temperature before serving or reheat to warm in a preheated 325°F oven.