Slow Cooker Sausage Casserole

  sausages (preferably good quality (this will prevent them from disintegrating the slow cooker during the long cooking time))

red onions (chopped)

yellow pepper (chopped)

of large sweet potato (chopped)

tin chopped tomatoes

tomato purée

boiling water

rich beef stockpot

dried rosemary

dried oregano

Cornflour to thicken if needed