Stir together flour, baking powder and salt. Add the yogurt and stir until the dough comes together well, adding more flour if necessary.
Knead the dough for 5 minutes.
Place the dough in an oiled bowl, covered with a towel, and allow to rest for an hour or longer. (This can rest overnight)
Take out the dough and cut it into 10 equal pieces. Roll each piece into a ball and then flatten into a disc. Roll each disc out with a rolling pin until 1/4 inch thick and about 8 inches in diameter.
Heat a large nonstick frying pan or griddle over medium heat. Also preheat your oven broiler to high.
One at a time, take each piece and cook over medium heat for 4-5 minutes, until the bottom is browned and it is starting to puff up. Slide a spatula under the naan and transfer it to the top rack of the oven. Allow the top to continue cooking for a minute or two, until nicely browned and puffy.
Remove from the oven and brush with melted butter if desired.
Cilantro Mint Chutney
Place all ingredients (except water) into blender and process until everything is crushed and combined.
Add water, 1 teaspoon at a time, to form a smooth paste.
Adjust seasonings as desired with additional salt, lemon juice, or spices.