sentence: add yeast to warm water sentence: add salt sugar and baking powder to flour sentence: add oil and mix well sentence: add yogurt and mix sentence: add the water and yeast sentence: kneed dough to become soft sentence: add oil to hands and kneed and set aside for 4 hours sentence: add oil and break dough into 6 pieces sentence: roll each ball into flat piece sentence: place naan on oven stone and bake sentence: remove from oven and put on plate sentence: brush with melted butter