STEP 1
In a saucepan over low heat, cook together ¼ cup soy sauce, 1 cup reserved pineapple juice (drained from the can), 1 tsp grated ginger, 1 clove grated garlic, and 2 tbs brown sugar until bubbling. In a small bowl whisk together 2 tbs corn starch and ¼ cup water – quickly whisk into the bubbling pan and cook one minute until thick.
STEP 2
In a bowl, combine ground beef, 1 tsp grated ginger, and ¼ cup teriyaki sauce that you just made. Mix until well combined. Form into patties.
STEP 3
Chop pineapple slices and combine them in a bowl with jalapeno and red onion. Set aside.
STEP 4
Cook hamburger patties in a grill pan on the stove or on the barbecue until a meat thermometer reads 135 degrees. Butter the buns and grill them along side the burgers.
STEP 5
Spread mayonnaise on one side of the buns and top with hamburger patty, pineapple salsa, lettuce, a slice of swiss cheese, and a spoonful of teriyaki sauce.