Bring a large pot of water to a boil, add soba noodles, and cook according to package directions, about 4 minutes. Drain noodles, rinse under cold water, and set aside to cool.
Whisk peanut butter, water, 1 tablespoon sesame oil, hoisin sauce, Sriracha, soy sauce, lime zest and juice, garlic, and ginger together in a small bowl for the dressing. Pour dressing over noodles. Add red bell pepper and toss to combine. Refrigerate until well chilled, at least 1 hour.
Stir teriyaki sauce, rice vinegar, and red pepper flakes together in a bowl until well combined. Cut pork tenderloin into very thin slices, about 1/8 inch thick, then cut each slice in half. Add pork to marinade, cover bowl, and chill in the refrigerator for 30 minutes or longer.
Remove pork from refrigerator. Heat a skillet over medium-high heat, and heat the remaining 1 tablespoon sesame oil until hot. Add pork, separating pieces to cover the skillet's bottom. Cook the pork, occasionally stirring, until cooked through, 2 to 3 minutes. Your time will depend on how thinly the pork is cut, but try not to overcook to retain tenderness.
Remove noodles from the refrigerator and give them a good stir. Divide the noodles among 4 plates or bowls. Evenly distribute the pork on top of the noodles and garnish with peanuts, green onion and sesame seeds before serving.
Nutritional Facts
Per 4 servings
Calories: 373
Carbohydrate: 44g
Fat: 16g
Fiber: 2g
Protein: 18g
Sugar: 7g
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