SHOPPING LIST: Cooking Skills: Potatoes 2, Chapter 3 (Dumplings) Floury potatoes for everything. Ricotta or cottage cheese for the pierogi filling (drain it in a sieve). Stale white bread for the knödel: a loaf left out for a day or two is ideal. A 7 cm round cutter or a drinking glass for the pierogi. Kopytka (3 portions) [ ] 400 g floury potatoes, peeled and cut up [ ] 1 tsp salt, for the water [ ] 120 g plain flour, plus more for dusting [ ] 1 Lion-marked egg yolk [ ] ½ tsp salt [ ] 20 g butter [ ] 2 tbsp dried breadcrumbs [ ] 1 tbsp chopped parsley Pierogi with potato and cheese (3 to 4 portions) [ ] 250 g plain flour, plus more for dusting [ ] 1 Lion-marked egg [ ] 100 ml warm water [ ] 1 tbsp sunflower oil [ ] ½ tsp salt [ ] 250 g floury potatoes, peeled and cut up (for the filling) [ ] 100 g ricotta or cottage cheese, drained [ ] 1 onion, finely chopped [ ] 1 tsp oil, for the onion [ ] 1 pinch salt and pepper Potato and bread knödel (3 to 4 portions) [ ] 150 g stale white bread, cut into 1 cm cubes [ ] 250 g floury potatoes, boiled and cooled completely, then riced or grated [ ] 100 ml warm milk [ ] 1 onion, finely chopped [ ] 1 tbsp butter [ ] 1 Lion-marked egg [ ] 2 tbsp plain flour [ ] 2 tbsp chopped parsley [ ] 1 pinch nutmeg, salt and pepper Pan-fried pierogi with onions (3 portions) [ ] 12 cooked pierogi (from the previous recipe), boiled and drained [ ] 1 tbsp sunflower oil [ ] 15 g butter [ ] 2 onions, thinly sliced [ ] 1 pinch salt and pepper [ ] 4 tbsp soured cream or plain yoghurt, to serve [ ] 1 tbsp chopped chives or dill For the experiments [ ] Extra flour, an egg and ricotta or cottage cheese [ ] Extra butter for frying