Place all ingredients for chicken into crockpot. Stir to coat chicken. Cover and cook on high for 4 hours or until chicken is very tender.
Shred chicken and place back into liquid. Cover and keep warm until ready to serve.
For quinoa, 30 minutes prior to serving chicken, melt butter in medium saucepan and sauté onion 2 minutes to start becoming tender. Stir in quinoa to coat in butter. Add in chicken stock and salt if desired. Stir, cover, bring to boil, reduce to simmer and cook 20-30 minutes or until liquid is absorbed and quinoa is soft.
Serve chicken over bed of warm quinoa and top with sesame seeds and cilantro.