1.5kg/3lb 5oz floury potatoes, such as Maris Piper or King Edwards, peeled
½ tsp crushed dried chilli flakes
½ tsp Tabasco sauce
3 tbsp olive oil
180ml/6fl oz olive oil, for shallow frying
1 tbsp red wine vinegar
salt
1 tsp hot smoked paprika (pimentón picante), plus extra for serving