Gran's bangers and mash bake

Method
Prep:15min  ›  Cook:45min  ›  Ready in:1hr 

1. Preheat the oven to 180 C / gas 4. Place potatoes in a saucepan with enough water to cover. Bring to the boil, and cook until tender, about 20 minutes.
2. Drain and mash with half the butter and enough milk to reach your desired creaminess. Continue mashing, or beat with an electric mixer, until smooth. Season with salt and pepper.
3. In a large frying pan over medium heat, cook the sausages until heated through. Remove from pan, and set aside.
4. Add remaining butter to the pan and fry the onions over medium heat until softened.
5. In a jug, mix the gravy mix and water as directed on the packet Add to the pan with the onions. Simmer, stirring constantly, to form a thick gravy.
6. Pour half of the gravy into a square baking dish so that it coats the base. Place sausages in a layer over the gravy. Pour the remaining gravy over them, then top with the mashed potatoes.
7. Bake in preheated oven uncovered for 20 minutes or until potatoes are evenly brown.