John Dory with Garlic Potatoes

I love this recipe, beautifully simple but fantastically tasty, great for a supper or dinner party, there's a bit of faff with the potatoes, but it's well worth the effort
This recipe will serve 4 people
SHOPPING LIST
4 John Dory Fillets about 150g each
50g of butter
A couple of garlic cloves finely chopped
A good splash of olive oil
A half handful of fresh chopped rosemary and thyme in equal amounts
FOR THE POTATOES
500ml of chicken stock (buy it! I'm not going to tell anyone)
100g of butter
4 shallots, peeled, cut in half and thinly sliced
4 bay leaves
8 cloves of garlic thinly sliced
A half handful of fresh chopped thyme
500g of charlotte potatoes cut into thin slices
METHOD
Put the chopped rosemary and thyme into a bowl and add a good splash of olive oil, about 50ml