Place chicken in slow cooker along with onion, garlic, ginger, pineapple, soy sauce, vinegar, ketchup, brown sugar and red pepper flakes. Cook on high for 3-4 hours, until chicken is soft. Remove chicken from slow cooker and shred with two forks. Return to slow cooker.
Heat tortillas over direct flame on gas cook top or in a large skillet. Keep warm in a cloth towel.
To serve, spoon some Hawaiian Chicken on top of corn tortilla and top with PIneapple Red Pepper Salsa.
Nutrition facts do not include tortillas