Heat a large, oven-proof pan over a medium high heat and add a little oil. Add mince and cook, stirring, until nicely browned (do this in batches if your pan is on the small side). Set mince aside and return pan to the heat.
Add vegetables and cook, stirring, for 5 minutes. Add mince back into pan along with stock, wine, chilli and soy. Season well with salt and pepper. Turn heat to medium and simmer for ten minutes, until liquid is reduced. While it’s simmering, slice potatoes and mix sour cream and milk together. Turn oven on to 200C.
Lay potato slices on top of meat mixture, overlapping slightly. You can make a couple of layers. Spoon over sour cream mixture and sprinkle over cheese. Top with parsley, salt and pepper.
Bake in oven for 30-40 minutes, until cheese is golden and potatoes are tender.
Serve pie with a green salad or steamed green vegetables.