Add the yeast, sugar, and salt to a bowl.

Add the warm water and stir to combine.

Let rest for 5 minutes.

In a separate bowl, combine the flour, yogurt, and oil.

Add the yeast mixture and mix until a dough forms.

Knead until the dough is soft and smooth, then lightly oil the surface to keep it moist.

Cover with a damp towel and let rest for 1 hour.

After resting, knead the dough again, then divide it into equal portions and roll each one into a naan shape, neither too thin nor too thick.

Heat a skillet over medium heat.

Brush a little water over one side of the naan, then place the wet side down in the skillet; it should stick right away.

When bubbles appear, invert the skillet over the flame, keeping the naan attached; once char marks appear, remove it from the flame.

When the naan is cooked through, remove it from the skillet, brush with a little butter, and serve hot.