In crock pot combine the first 7 ingredients (onion - broth), cover and cook on low for 6 hours.
Meanwhile, heat oil in skillet over medium high heat and add seitan strips. Brown on all sides. Remove from heat and set aside.
Strain broth/stock and return broth to crock pot.
In a small cup combine miso paste with water.
In a small bowl combine the next 2 ingredients and the miso/water mixture. Add to broth in crock pot. Stir in drained rice sticks and seitan. Cook for 5-10 minutes longer or until rice sticks are soft.
To serve, ladle soup into bowls and garnish with bean sprouts, scallions and cilantro.