Preheat the oven to 160°C fan. Place the cornflour on a plate and season with salt and black pepper. Place the beef in the cornflour, turning to coat on all sides.
Spray a large frying pan with low-calorie cooking spray and place on a medium heat. Add the beef and fry for a few minutes until browned and sealed all over. Add the onion, garlic, peppers and ginger, and continue to fry for a further 3 minutes. Transfer to a casserole dish.
Add the carrot, celery, potato, pineapple, chopped tomatoes, stock, tomato puree, Henderson's relish, soy sauce, sweetener and hot pepper sauce and stir well.
Cover the dish with a tight-fitting lid or tight-fitting foil and place into the oven for 2-3 hours. Check on the casserole occasionally and add a little more boiling water if needed.
The vegetables and beef should be soft and tender, and the sauce thickened. Serve with your choice of accompaniment.