Preheat the oven to 425°F
Remove the chicken from packaging and pat it dry
Place the chicken breast-side down on a cutting board
Use kitchen shears to cut along both sides of the backbone
Remove the backbone
Flip the chicken breast-side up
Press firmly on the breastbone to flatten the chicken
Tuck the wing tips under the body
Season the chicken with salt, pepper, and any desired spices or oil
Place the chicken skin-side up on a baking sheet or roasting pan
Roast for 45 to 60 minutes
Check that the thickest part of the breast reaches 165°F
Check that the thickest part of the thigh reaches 175°F
Remove the chicken from the oven
Let it rest for 10 to 15 minutes
Carve and serve