Goulash

Name: Goulash
Ingredients: 1 onion, chopped; 1 pepper (red or green), sliced; garlic puree; 2 tsp paprika; 1 tsp cayenne (optional); 3 carrots, sliced; 400g diced beef (or use raw beef chunks); 400g chopped tomatoes; 2 tbsp plain flour; 2 tbsp tomato puree; 500ml beef stock; 2 tbsp natural yoghurt (or soured cream); fresh parsley; 2 tbsp oil