In a small jug or bowl, mix the yeast, sugar, and warm water in a bowl. Stir well to dissolve the yeast and then set aside to activate for 10 minutes.
To make the dough, mix together the flour, yoghurt, olive oil, salt and yeast mixture in a large bowl and give it a good mix. I start with a wooden spoon and then use my hands to knead it until a dough is formed and it comes together.
Oil the bowl well and then place the dough ball back inside, brushing the top with a little more oil and cover the whole thing with a kitchen towel. Set it aside somewhere warm and leave it for about an hour, or until it has doubled in size.
For the butter just mix together the melted butter or ghee with the garlic and parsley.
Deflate the risen dough using your hands and then divide it into 8 pieces. To shape them simply squash them with the palm of your hand and tease them out using your fingers. They should be about 1/4 inch thick.
Cook them over medium heat in a lightly oiled pan for about 2-3 minutes until lots of bubbles form at which point you flip them over and carry on cooking for another 2 minutes of so. Once cooked brush with the garlic butter and serve immediately.
You can cook all the naan, keeping it warm under a kitchen towel or in a low oven and then brush with the melted butter just before serving.