When all your dumplings are ready to be cooked, heat 1 tbsp olive oil in a large frying pan over medium heat, making sure the oil covers the bottom of the pan evenly. Add as many dumplings as will fit without crowding them too much – you don’t want them sticking together. Let them cook for a minute or so, just long enough for the bottoms to get slightly golden brown, then use tongs to carefully flip them, cooking another minute or so.