To make the Huli Huli sauce, in a mixing bowl, add ketchup, brown sugar, pineapple juice, rice vinegar, soy sauce, ginger paste, minced garlic, sesame oil and Dad's All Purpose rub. Whisk the ingredients together and set aside.
Cut chicken thighs into 1 inch cubes and toss them in a ziplock bag.
Pour 3/4 of the Huli Huli sauce over the chicken. Close the bag and message the marinade over the chicken cubes making sure to cover all pieces. Set it in the fridge to marinate for at least 1 hour.
Skewer the individual chicken pieces onto a skewer stick.
Set the grill to high direct heat at 450 degrees.
Place the marinade Huli Huli chicken skewers on the grill. Flip every minute for a total of 10 minutes or until the meat reaches 175 degrees internal temp.
Brush the skewers with the remaining huli huli sauce and leave them on the grill for another minute allowing the sauce to caramelize over the chicken
Rest for 10 minutes.
Drizzle grilled chicken skewers with sriracha mayo.