Pre-heat oven to 190°C or gas mark 5.
Place tomatoes and beans in ovenproof dish. Chop onion finely and add to tomatoes and beans.
Roughly cut the sausages and add to the tomato and bean mix. Mix together and pop in the oven until the sausages are cooked through (approximately 45 minutes).
Cover the sausage mix with mashed potato and grated cheese.
Place under grill to brown, or alternatively return to the oven until brown and bubbly.
Prep time: 15 mins
Cook time: 45 mins
454g sausages (approx 8) or veggie alternative
1 large onion
900g mashed potato
50g cheese, grated
400g tin of baked beans or red kidney beans
400g tin of chopped tomatoes