To freeze pre-baked naan: Bake the naan as directed but do not add the garlic butter. Cool completely. Wrap each piece in plastic wrap and store in a freezer bag. Thaw and reheat in the over or in a skillet. Add the garlic butter before serving.  To freeze unbaked naan: Form a ball with the dough, wrap tightly with plastic wrap and freeze. Thaw the dough, cut it into pieces, form the naan and bake as directed.