Veal stroganoff

By Matt Tebbutt From Saturday Kitchen Ingredients For the veal stroganoff 100g/3½oz unsalted butter 2 onions, finely chopped 400g/14oz white mushrooms, sliced handful fresh black trumpet mushrooms 1 tbsp plain flour 500g/1lb 2oz veal rump, sliced 50ml/2fl oz cognac 150ml/5fl oz hot beef stock …