So I catered for my friends' 3-year anniversary dinner and one thing I had made was romesco sauce potato cakes with grilled chicken.
This is a simplified version of the potato cakes. What you can do is peel and boil the potatoes, mash them and add some butter then mix in some of the romesco sauce. Form it into patties, dip in flour and shallow fry them.
Peel the potatoes and thinly slice them.
Heat about 2 tbsp of neutral oil in a deep pan, and when hot, add the potatoes and shallow fry. Spread them on the pan and do not layer them. Fry for two/three minutes per side, you should easily cut through it.
Drain the potato slices on a kitchen towel and serve with romesco sauce and herbs.