Combine yeast, sugar, and water and let sit for 5 to 10 minutes, or until foamy. In the mwantime, combine flours, baking powder, and baking soda in a bowl. Make a well in the center.

Stir milk and yogurt together. Once the yeast mixture is foamy, stir it into the yogurt and milk. Pour into the well of the dry ingredients.

Stir with a wooden spoon to combine, then knead the dough until smooth. Place dough in a well-oiled bowl, cover, and let rise for about an hour, or until double in size.

When dough is ready, punch down and turn out on a well-floured surface. Divide in half, then divide each half into 8pieces of equal size. Roll each piece out into a thin oval approximately 6 inches long and 1/8 inch thick. Heat a cast iron skillet over medium-high heat on the stove top.

Once pan os hot, brush each side of the naan with melted butter/ghee. If adding toppings like onion, garlic, or spices, add them to the second side you brush with butter and gently press them into the dough.

Place dough into the skillet. If toppings were added, place it topping-side up. Let cook for around 1 minute, or until dough puffs and bubbles form on the top. Flip and let cook for another minute. Repeat with remaining pieces of dough.