Add the peanut butter, rice vinegar, soy sauce, sugar, chili oil, and grated garlic to a bowl. Set aside.
Bring a medium pot of water to a boil for the noodles.
While the water heats, heat the avocado oil in a skillet over medium heat. Add the ground beef and cook, breaking it up with a wooden spoon, for 7 to 8 minutes, until no pink remains and some of the edges are starting to get crispy.
Add the ginger and cook for about 30 seconds, until fragrant. Add the soy sauce, sugar, and Shaoxing wine and cook for another 2 minutes, stirring well to combine.
Meanwhile, cook the noodles according to package instructions. Reserve about ½ cup of the noodle water, then drain the noodles well.
Add 3 or 4 tbsp of the reserved noodle water to the sauce and whisk until smooth. If it's still too thick, add another 1 to 2 tbsp until it's loose enough to easily toss with the noodles.
Add the drained noodles to the sauce and toss until evenly coated.
Divide between bowls right away and spoon the beef over top. Garnish with thinly sliced cucumber, green onions, and sesame seeds.