Slow Cooker Shepherd's Pie

fresh lamb mince (or leftover roast lamb if you have it)

onion (chopped)

large carrots (diced)

chicken stock (or beef/lamb if you have it)

Worcestershire sauce

tomato puree

tinned peas (or frozen/fresh peas (whichever you have))

Salt and pepper

Enough potatoes to top your dish (I used 3 large baking potatoes)

Splash of milk

Knob of butter