Making the 4-Ingredient Roast Chicken Dinner is straightforward. Simply follow these steps:

1. Preheat the Oven: Preheat your oven to 425°F (220°C).
2. Prepare the Chicken: Rinse the chicken under cold water and pat dry with paper towels.
3. Season the Chicken: Rub the entire chicken with olive oil, coating it evenly.
4. Add Seasoning: Generously sprinkle the kosher salt and garlic powder all over the chicken.
5. Place in Baking Dish: Transfer the seasoned chicken to a roasting pan or a cast-iron skillet, breast side up.
6. Roast the Chicken: Place the chicken in the preheated oven and roast for approximately 1 hour, or until the internal temperature reaches 165°F (75°C).
7. Rest the Chicken: Once done, remove the chicken from the oven and let it rest for 10-15 minutes before carving.
8. Carve and Serve: Cut the chicken into portions and serve with your chosen sides.

Following these simple instructions will yield a fantastic roast chicken bursting with flavor.