Preheat oven to 350F.
In a small saucepan over medium heat, whisk together the pineapples, soy sauce, honey, ginger, and garlic. Whisk in the cornstarch and cook, stirring constantly, until thick, about 2 minutes. Allow mixture to cool.
Place the chicken, breadcrumbs, salt and 1/4 cup of the teriyaki sauce in a bowl and mix until well combined.
Using a 1 tablespoon measure or small ice cream scoop, shape the mixture into balls.
Place the meatballs on a parchment-lined baking sheet and bake for 12-14 minutes, until cooked through.
Serve with the extra teriyaki sauce for dipping.
To Freeze: Place uncooked meatballs on a cookie sheet in the freezer for 30 minutes, then transfer to a labeled freezer bag. Defrost in the fridge overnight and continue cooking as directed above in step 5. Alternately, bake the meatballs directly from frozen, adding 5 minutes to the cooking time.