Salmon Teriyaki Skewers With Pineapple

soy sauce

mirin rice wine or rice vinegar

brown sugar

minced garlic

minced fresh ginger

minced green onions

vegetable oil

chili pepper flakes

salmon fillet, rinsed, cut into 1 to 1 1/2-inch cubes

fresh pineapple, cut into 1 to 1 1/2-inch chunks

green onions, cut into 1-inch segments

bamboo skewers, soaked in water for at least 20 minutes before using