Mix Tapatio Pollo Asado Marinade with pineapple juice. Add chicken breasts and marinate for at least two hours.
Transfer marinated chicken to Instant Pot and cook on high pressure for 10 minutes. Let the steam naturally release for 5 minutes, then remove chicken and let rest for 10 minutes before shredding.
While the chicken is resting, turn on the saute setting in the Instant Pot for 5 minutes. Make a slurry with cornstarch and water and pour it into the liquid to thicken. Toss shredded chicken back into the sauce.
Preheat the oven to 325 degrees Fahrenheit and grease a 9x13 baking dish.
Slice loaf of King’s Hawaiian Rolls in half, leaving individual rolls intact. Layer shredded chicken in an even layer. Top with thinly sliced red onion, pepper jack cheese, and a sprinkle of chopped cilantro. Top with the remaining half of the loaf and brush with garlic butter.
Cover with aluminum foil and bake for 15-20 minutes, until the cheese is melted.
Allow cooling for at least 5 minutes for pulling apart and serving. Enjoy!