Truss it and place in a small casserole with the butter and the two cups of Champagne.
Cook in a moderate oven about 45 minutes.
Baste every eight minutes and turn until the chicken is an even golden brown on all sides.
Remove chicken, cut off string and keep warm on a hot platter.
For The Sauce:
Add to the juices in the casserole the cream, shallots, mushrooms, parsley, bay leaves and thyme.
Simmer on top of stove until the sauce has reduced to two thirds of the original amount.
Strain through a fine sieve into a clean saucepan.
Place over a medium heat and swirl in the butter.
Add the glass of champagne
For The Presentation
Spoon some of the sauce over the chicken. Serve the rest separately.
This recipe is originally from Le Pavillon in New York. To serve the chicken as per Le Pavillon take the chicken to the table whole and carve it there.