In a very small saucepan, combine the3 tablespoons light soy sauce, 2 tablespoons oyster sauce, 1 1/2 tablespoons mirin, 2 teaspoons brown sugar, 1 teaspoon sesame oil and 1/8 teaspoon white pepper. Stir over low heat until the sugar has dissolved.
In a small bowl, whisk together the 1 teaspoons cornstarch and 1 tablespoons water. Whisk into the sauce until thickened and glossy.
Remove from the heat and stir in the 1-2 teaspoons chili crisp oil*, if using.
Udon Noodle Stir Fry:
If using vacuum packed 18-20 ounces fresh udon noodles, they are already cooked. Simply rinse them under warm water to separate and then toss them in a small amount of vegetable oil to preventing sticking. Set aside. If using dry or frozen, cook according to package direction minus 1 minute and then drain and toss with the oil. Set aside.
In a large skillet, heat 1 tablespoons vegetable oil over medium-high heat. Add the 12 ounces ground pork, breaking into bits as it browns. Aim to get a bit of char on the meat. Flip every 2 minutes for approximately 6 minutes or until no pink remains. Using a slotted spoon, remove the meat to a paper towel lined plate.
If there is still some fat left in the pan, leave it, if it is dry, add 1 tablespoon more of the vegetable oil. Over medium heat, add the minced 3 cloves fresh garlic, grated 1 tablespoon fresh ginger, 4 scallions, 2 stalks bok choy, sliced 1 cup white mushrooms and 1 cup snap peas. Cook, stirring to prevent sticking, for approximately 5 minutes or until the vegetables start to soften. Vegetables should be vibrant in color and soft, but still holding their shape (except bok choy, that will wilt). Remove the vegetables to another bowl.
With the skillet still hot, add the prepared udon noodles, arranging in a single layer and trying to get a sear on one side. Cook for 1 minutes.
Pour the sauce over the noodles and with tongs, toss lightly in the sauce.
Add the cooked ground pork and vegetables back to the noodles, continuing to toss lightly. Do not overtoss, this will make the noodles gummy.
Serve immediately with fresh lime wedges, additional scallions and extra additional chili crisp, and/or sesame seeds if desired.
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Notes
*Sriracha or sambal oelek can also be used. Storage: Cool completely before transferring to an airtight container. Store in the refrigerator for up to 3 days. Reheat in a warm skillet over medium heat.Freezing: Technically you can freeze this dish, but the texture of the noodles will soften upon thawing. Freeze in an airtight container for up to 2 months.