In a large mixing bowl, sieve in flour, then add yeast, sugar and, mix well.
Add 1 tablespoon of canola oil, yoghurt then water, roughly mix everything using a wooden spoon.Then start kneading with your hands. Knead for 11 to 12 minutes until the dough gets less sticky (but still sticky as this is a sticky dough).
Transfer the dough into a floured surface (using the 1 tablespoon of flour). Wash the mixing bowl and slightly grease it with oil and transfer the dough in it. Cover with a cling wrap or kitchen towel and let it rise for 1 to 2 hours or until it doubles in size.
Roll the dough onto a floured surface and press down to form an even layer. Then cut equal size portions, roll the portions to form a ball. And let the balls prove for 20 to 30 minutes.
Meanwhile heat up the oil, when the oil is hot enough, drop the dough balls into the hot oil and fry on all sides until golden brown.
Cut amagwinya in half and add cheese and polony or any cold meat you like and serve.