Butter
In a large saucepan, add the whole chicken, the white wine, the bay leaves, the sprigs of rosemary, the head of garlic with the tip cut off.
Add the salt, the black peppercorns, the peeled onion and bring to a boil over medium to low heat.
Cover the saucepan and let it all cook for 15 minutes.
In a small bowl, add the softened butter, the salt, a pinch of black pepper, the Italian seasoning and mix everything very well until combined.
After the chicken has cooked through, drain all the wine and transfer the chicken to a baking dish.
Spread the seasoned butter all over the chicken with a brush.
Cover everything with aluminum foil, take it to a preheated oven at 180° C (350° F) and bake for 40 minutes.
After this time has passed, remove the aluminum foil, take it back to the oven and bake for another 20 minutes.
Serve.