Stir together all ingredients in a bowl until combined. Set aside.
Put the bell pepper, pineapple, ginger, garlic and serrano pepper in a medium bowl.
Sprinkle the chicken evenly with the salt. Heat a large skillet or saute pan over medium-high heat until a drop of water sizzles and immediately evaporates. Add the oil and the chicken. Cook 1 minute without disturbing, then stir the chicken and continue cooking until the chicken is cooked through and no longer pink.
Stir in the pineapple mixture and cook for 1 minute. Pour in the sauce and cook until the sauce is bubbling and thickened, about 2 minutes.
Remove from the heat and add the cilantro and green onions. Serve hot over cooked rice or rice noodles.
