Lightly grease a large oval baking dish.
Using a mandolin or sharp knife, slice the
potatoes into thin slices, about 3mm thick.
Tip into a bowl and coat with the melted
butter, oil, herbs and some seasoning.
Tightly pack the potatoes upright
into the dish. Wedge some bay leaves
throughout and pour over the remaining
butter mixture from the bowl over the
top. Cover with foil and bake for 30 mins
at 200C/180C fan/gas 6.
Remove the foil and cook for a
further 45 mins at 220C/200C fan/gas 7, until the
potatoes are cooked through.