Pierogi Ruskie Recipe - Great British Chefs

Ingredients

• 1kg plain flour, or 00 pasta flour, plus extra for dusting
• 1 egg, lightly beaten
• 1 tbsp of vegetable oil
• 250ml of water, lukewarm
• 1kg large potatoes, peeled and cut into quarters
• sea salt
• freshly ground black pepper
• 300g of twaróg, quark, curd cheese or cream cheese
• 2 tbsp of vegetable oil, preferably organic
• 1 tbsp of butter
• 1 large white onion, very finely chopped