Winter warmer - Lamb hotpot/shepherds pie thingie

We had roast lamb and all the trimmings on Sunday. It was a big leg of lamb and we had plenty leftover. I diced the lamb and with some sliced onions, fryed them in a large saucepan. I then diced up the leftover veggies and chucked them in the pan too. Added a beef stock cube, a few glugs of Worchester sauce and balsamic vinegar and the leftover gravy and some hot water. Once heated through I put it all in a large oven dish and placed it in the oven at about 180C. I boiled some peeled Agria potatoes whole and when almost cooked I drained and sliced them placing over the top of the meat. Sprinkled with salt and pepper and dotted some butter and replaced in the oven until the potatoes were starting to brown. Served with cabbage and sprouts! (No-one will want to be downwind of us tonight!)