Step 1

Heat 1 tablespoon sesame oil in a large skillet over medium-high heat; cook and stir chicken, salt, and pepper in hot oil until chicken is almost cooked through, 5 to 7 minutes.

Step 2

Heat remaining 1 tablespoon sesame oil in a small skillet over medium heat; cook and stir bell pepper and onion squares until edges of peppers are tender, about 5 minutes. Remove skillet from heat.

Step 3

Mix teriyaki sauce, chicken broth, chopped sweet onion, and garlic powder with chicken; bring to a boil. Reduce heat to medium-low and simmer until liquid is reduced by half and chicken is cooked through, 15 to 20 minutes.

Step 4

Stir bell pepper-onion mixture, cashew pieces, and hot sauce into chicken mixture and simmer until heated through, 2 to 3 minutes. Remove skillet from heat. Stir pineapple into chicken mixture. Arrange Swiss cheese slices over chicken mixture.