- Preheat the oven to 375F.
- Heat the oil in a frying pan and gently fry the onion, pepper and sweet potato or carrots until softened but not browned.
Transfer to a flameproof casserole.
- Add the green beans, baked beens, corn 9and liquid), tomato paste and barbecue spice seasoning.
Bring to a boil, then simmer ofr 5 minutes.
- Cover the vegetable and cheese mixture wih the sliced potato, brush with water, season with salt and pepper and bake for 30-40 minutes until golden brown on top and the potato is cooked.