Boneless and stuffed roast chicken

Ingredients for 4 people:
– A boneless roasting chicken (by your butcher if he is nice or by yourself)
– 300 gr of minced meat
– 1 small chopped onion
– 2 tbsp of oil
– an egg
– a slice of sandwich bread soaked in milk and wrung out
– a tbsp of mustard
– a tsp of ginger
– a chicken stock cube
– a bay leaf
– a tbsp of garlic powder or a crushed garlic clove
– a can of button mushrooms
– a tbsp of butter
– salt and pepper
Preparation:
the rest is on the next page