Lotty it is very much like the recipe you posted, chicken breast not whole bird.
I make the sauce, it is a mushroom sauce, fine dice mushroom and shallots, sweated then add mushroom sauce, first time I added too much and was very salty.
We purchased the terracotta dishes when in Turkey, could not find decent ones in UK, heat them up, put the cooked stuff chicken in them on a a bed of shredded cheese cover, cook until melted add the sauce and cook again.
Delicious.