Cook the soba noodles
according to the package directions. Rinse, drain
and set aside.
In a blender, combine the peanut butter, fish sauce, soy sauce, brown sugar, chili garlic sauce, sesame oil, garlic and ginger with 1/4 cup hot water; puree until smooth and set aside.
Heat a wok or large skillet on medium high. When it's hot, add 1 tablespoon peanut oil and swirl to coat the pan. Add the shrimp and saute until they just turn pink, about 2 minutes. Transfer them to a plate.
Add the remaining tablespoon peanut oil to the wok and swirl. Return the shrimp to the pan along with the peanut sauce and cooked soba. Stir-fry for 1 minute.
Transfer the stir-fry to a serving plate or divide among 4 bowls. Top with the cilantro and peanuts. Serve with lime wedges on the side.