Preheat oven to 180°C.
In a bowl combine the mustard powder, green pepper, onion, mince, water and contents of the sachet of KNORR Homestyle Meatball Kebabs Dry Cook-in-Sauce.
Shape into 12 meatballs and roll into flour.
In a frying pan, brown meatballs in oil and place in an ovenproof dish.
Gradually stir in the tomato juice and bring to a boil.
Cook for 2 minutes or until the sauce has thickened.
Pour over meatballs and add vegetables.
Cover and bake in a preheated oven for 1 hour or until meatballs are cooked through and vegetables are tender.