1.In a mixing bowl use your hands to combine mincemeat with raw egg until the mixture becomes sticky and starts combining.
2.Take a small handful of mine meat and roll into balls, then flatten to make a meat patty.
3.In a saucepan cook two of the mince patties in some oil while lightly sautéing the cut onion in the same pan alongside the patties.
4.In a blender / food processor, add 1 cup cashews to 1/4 cup water and blitz until cashew mixture is creamy - if needed add more water. If there is left over mixture, store in fridge for pie later in the week.
5.In a separate serving bowl, build a stack of spinach leaves, tomato slices and add 1 heaped tablespoon of cashew cheese on top.
6.Add cooked mince patties on top of cashew cheese and sautéed onion on top to finish your burger stack.
7.Serve with a side of sweet potato chips.