These traditional scallion pancakes, also known as Cong You Bing, are a popular Chinese street food. Made with a simple dough of flour, water, and salt, these pancakes are rolled out thin and filled with a mixture of chopped scallions, sesame oil, and salt. They are then pan-fried until golden and crispy. The result is a deliciously savory pancake with layers of flaky goodness and a fragrant aroma from the scallions. Serve them hot with a dipping sauce made from soy sauce, vinegar, and chili oil for an authentic taste.