Toss leeks, flour, and pinch each salt and pepper in medium bowl. Heat oil in 12-inch skillet until shimmering. Add half of leeks and fry, stirring often, until golden brown, about 6 minutes. Using slotted spoon, transfer leeks to paper towel-lined plate; sprinkle with salt and pepper to taste. Repeat with remaining leeks.

Makes about 1/2 cup