Make the base
1 batch makes about 110 g — enough for 7 Neapolitan piesWarm the oil and garlic in a small pan over the lowest heat until the slices barely fizz, about 5 min — pull it before they colour, or the whole batch turns bitter. Stir in the salt and the pepper flakes if you're using them, and let it cool. Brush it on thin; a white pie wants a sheen, not a puddle. Keeps refrigerated 1 week.
Extra-virgin olive oil
scant ½ cup100 gGarlic cloves, thinly slicedAbout 3 cloves
3 cloves9 gFine sea salt
½ tsp2 gRed pepper flakesOptional
a pinch1 g