Preheat oven to 180°C.
Heat oil in a pan and lightly sauté the onion until soft.
Add the beef mince and fry until well browned.
In the meantime slice the parboiled potatoes and place a layer into the bottom of an ovenproof casserole dish and top with some cooked mince.
Continue to build the layers and finish with a potato layer.
Empty the KNORR Savoury Mince Dry Cook-in-Sauce sachet contents into a jug and mix with the cream and water.
Pour the sauce over the layers and bake in a preheated oven at 180°C for 30 minutes or until golden brown on top and the potatoes are soft.