Brown and drain mince in a non stick frying pan - do not add any cooking oils to brown.
Combine mince with stock, carrots, onions and leek in a large casserole dish. Bake at 200 C / Gas 6 for one hour, covered.
Remove casserole dish from oven and give the mince mixture a stir. Add potatoes and soy sauce and stir again. Taste and add salt and pepper to taste if needed. Return to the oven for 30 minutes, uncovered.
Only if necessary, thicken the dish as the very end with a mixture of 1 teaspoon cornflour and 1 teaspoon water.
I didn't fancy the idea of leeks and onions so used green beans instead, added some mushrooms I had left over and the result was absolutely gorgeous. Family loved it. In fact, I'm making it again tonight, it was that good. - 23 Nov 2011