In a medium bowl, combine the yeast, sugar and water. Let stand 5 minutes.
Meanwhile, in a large bowl or the bowl of a stand mixer fitted with a kneading hook, mix together the flour, baking soda and baking powder.
To the bowl with the yeast mixture, add the yogurt and milk and whisk together Add this mixture to the flour mixture. Knead with your hands or the kneading hook until the dough forms a smooth, soft ball, about 2 minutes. Place the dough into a greased bowl and cover with plastic wrap. Let rise at room temperature until doubled, about 2 hours.
When dough is almost risen, combine butter and garlic in a small saucepan and heat over medium heat on the stovetop until butter is melted (or heat in the microwave in a bowl for 1 minute). Turn off heat (or remove from microwave) and set aside.
Remove the dough to a well-floured surface. Knead it briefly, then divide the dough into 12 equal portions. Roll each portion into 1/4-inch thick ovals, approximately 6 inches wide.
Heat a cast-iron skillet over medium low heat. Brush one side the dough with some garlic butter and place buttered side down in skillet. *Don't crowd the skillet. The dough needs to lay completely flat. I could only cook one at a time in my 10-inch skillet.) Cook for about one minute, until the dough puffs up. Lightly brush with a bit more garlic butter, then flip dough, cover the pan, and cook for one more minute. Remove from the pan. *(If your skillet doesn't have a lid, use a large baking sheet to cover the top for the last minute of cooking).
If serving immediately: Brush both sides of hot Naan with more garlic butter and sprinkle with salt. Place in a towel-lined bowl until ready to serve.
If making ahead: Don't brush Naan with garlic butter or salt after removing from pan. Simply remove to a cooling rack to cool completely.
To serve (if serving immediately): strain remaining garlic butter to remove the garlic pieces (add a bit more melted butter, if necessary). Drizzle strained warm garlic butter over naan and sprinkle with chopped parsley and/or cilantro.
To serve (if making ahead): Make a little garlic butter by melting 1/4 cup butter with 2-3 minced garlic cloves. Drizzle over re-warmed Naan and sprinkle with salt and chopped herbs.
Be sure to read the "Cook's Notes" in the original post, where I share some valuable tips, options, substitutions and variations for this recipe!