Meatballs with vegetables and curry sauce

1 large carrot 1/3 courgette 2 spring onions 700 g minced chicken 1 pinch of cayenne pepper 1 pinch of curry powder 1 egg 70 g breadcrumbs Salt and pepper Oil or butter 1 onion 1 pepper 2 cloves of garlic 2 tsp curry powder 1 tbsp tomato purée 1.5 tbsp flour 1 stock cube (chicken or vegetable) 100 ml cream Salt and pepper Oil or butter