Add the yeast and water to the Thermomix bowl. Warm through for 1 minute / 37 degrees / speed 1.
Add the flour and yoghurt to the bowl. Mix for 5 seconds / speed 3.
Add the oil and salt to the. bowl. Mix with Dough function / 30 seconds.
Transfer dough to a lightly oiled bowl, cover with a damp tea towel or plastic wrap and leave in a warm place until the dough has double in size (1-2 hours depending on how warm your house is).
Turn the dough out onto a floured surface and divide it into six equal portions. I find the easiest way to do this is to form a sausage and cut into six pieces.
Now take each piece of dough and form it into ball, as though you were making bread rolls. And then flatten each dough ball slightly with the heel of your hand.
Place the flattened portions onto a tray and cover with a clean tea towel for around 15-20 minutes until they have risen slightly. There won't be a huge difference is size but you will see/feel that they are more puffy.
Take each portion and use a rolling pin to roll it out to around six inches.
Pre-heat a cast-iron skillet or non-stick frying pan until very hot.
Place the naan into the hot pan. After a few seconds it will start to bubble up. Check the underside to see when it is nicely browned (this should only take around a minute) then flip it over.
Allow it to cook for around another minute until you start to get some charring on the bubbles.
Now remove it from the pan and brush it with some melted butter while it is still hot ( I keep my naan bread wrapped in a clean tea towel after I cook them to keep warm, and then brush them all with the melted butter together.)