1. Cook the noodles according to the package directions. Reserve 2 tablespoons of cooking water, then drain.
2. Heat the neutral oil in a small skillet. Fry the egg until the white is set and the edges are crisp; cook the yolk to your preferred doneness.
3. Toss the noodles with soy sauce, rice vinegar, the reserved water, and half the chili crisp. Top with the egg, scallion, and the rest of the crisp.
Contains wheat, egg, soy, and sesame when prepared with wheat noodles and standard soy sauce. Check your ingredient labels. Little Jar products are illustrative; you can make this recipe with your favorite chili crisp.