Heat the oven to 440 F / 225 C.
Rinse fresh bird in cold water.
Rub inside with salt, pepper and (optional) thyme.
Rub outside with salt and pepper, cover with slices of butter.
Bake for 30 minutes.
Turn the bird, spoon liquid over.
Bake for about another 30 min. Check with a thermometer 180 F / 82 C