Place the chicken and garlic cloves in a casserole dish. Pour over the olive oil and use your hands to smear it all over the chicken and garlic.
Season with salt and pepper and the herbes de provence. Tuck in the bay leaf and parsley.
Make a dough with the flour, water and a little oil. Roll into a long thin sausage. Moisten the inside rim of the casserole with a little water and press the dough all the way round. Clamp the lid firmly in place.
Cook in a preheated oven at 180 C Gas 4 for 1 hour and 45 minutes. Break the seal at the table.