Make a mash, sauté onions until golden, mix the sautéed onions into the mash and lightly gratinée in the oven (serve with extra sautéed onions on the side according to your preference).
Make a mash, sauté onions until golden, mix the sautéed onions into the mash and lightly gratinée in the oven (serve with extra sautéed onions on the side according to your preference).