Preheat the oven.
Set your oven to 425°F. If you’ll be roasting in a cast-iron skillet or Dutch oven, place it inside the oven to preheat as well.
Prep the chicken.
Take the frozen chicken out of the freezer and rinse it briefly under warm water, inside and out. (Always wash your hands and surfaces thoroughly after handling raw poultry!) Trim any visible fat or giblets if possible.
Pressure cook.
Place the chicken, breast side down, on the Instant Pot rack. Add 1 cup of water, close the lid and valve, and cook on high pressure for 25 minutes.
Season.
Quick-release the pressure and carefully remove the chicken. Drain any water from the cavity, pat it dry, and season generously inside and out with sea salt and your favorite herbs. You can also tuck garlic cloves into the cavity for extra flavor.
Roast.
Place the chicken breast side down in the hot cast-iron skillet or roasting pan. Roast for 25 minutes, or until the skin is golden and crispy. If needed, broil for an extra 5 minutes for extra crunch. The juices should run clear and the meat fully cooked.