Cook the 10 ounces noodles according to the package directions. Drain, then toss with a splash of oil so they do not clump while you cook the beef.
In a small bowl, whisk together the ⅓ cup soy sauce, 3 tablespoons brown sugar, 3 tablespoons peanut butter, 2 tablespoons rice vinegar, 1 tablespoon sriracha, 1 tablespoon sesame oil, and 1 tablespoon fish sauce until smooth.
Heat the 1 tablespoon vegetable oil in a large skillet or wok over medium high heat. Add the 1 pound ground beef and cook, breaking it up, until browned. Then leave it alone for a minute or two so the bottom crisps and caramelizes. That dark, sticky crust is the whole point, so do not rush it.
Add the 4 cloves minced garlic and 1 tablespoon grated ginger and cook for 1 minute, until fragrant.
Pour in the sauce and let it bubble and reduce for 2 to 3 minutes, stirring, until it turns glossy and sticky and coats the beef.
Add the cooked noodles and toss until every strand is coated in the sauce.
Stir in most of the sliced green onions and chopped peanuts, saving some for the top.
Serve topped with the remaining green onions, peanuts, ¼ cup cilantro, and lime wedges.