Step 1

In a large skillet, heat the peanut oil. Add the peanuts and fry over moderate heat until golden, about 8 minutes; let cool slightly. Transfer the peanuts and oil to a food processor. Add the jalapeño, garlic and ginger and process until minced. Add the soy sauce, water, rice vinegar, Sriracha, sugar and sesame oil and process until smooth. Season generously with salt.

Step 2

In a pot of boiling salted water, cook the noodles until al dente. Drain and rinse under cold water; pat dry. Toss the noodles with the dressing and mound in serving bowls; top with the garnishes and serve.