Cook noodles in 6 quarts boiling water for 3 minutes. Drain in a colander over a bowl, reserving 3/4 cup cooking liquid. Place noodles in a large bowl.
Heat oil in a large nonstick skillet over medium-high heat. Add peanuts to pan; sauté 2 minutes or until fragrant. Remove from heat; cool slightly. Combine peanut mixture, soy sauce, and next 4 ingredients (through ginger) in a mini chopper; process until finely ground.
Cook pork and salt in skillet over medium-high heat 8 minutes or until done, stirring to crumble. Add peanut mixture and 3/4 cup cooking liquid to pork; bring to a boil. Cook 1 minute, stirring frequently. Add pork mixture, juice, and onions to noodles; toss well. Place about 1 3/4 cup noodle mixture in each of 4 bowls; top each serving with 5 tablespoons cucumber and 1 tablespoon cilantro.