My Store Cupboard Slow Chilli

Name: My Store Cupboard Slow Chilli
Cuisine: European
Ingredients: ovenproof pan with lid; a splash of olive oil; 1 large onion, chopped; 500g good quality lean beef mince; 2 cloves of garlic, crushed or chopped as liked; 2 finely diced red chillis, with seeds or deseeded as liked. If you don’t have fresh chillis, you can also use chilli flakes – I usually add (at least) a couple of teaspoons; 2 tsp ground cumin; 1 tsp ground coriander; 1 tsp paprika; a pinch of cayenne pepper; 1 tbsp tomato purée; 1 tin chopped tomatoes; 500ml beef stock. *Note – if doing the quick cook version, add only about 300ml of stock, topping up if needed later; hot water to top up, as required; salt and pepper, as liked; 1 tin red kidney beans, drained; chopped coriander leaves, to garnish; a spoon of sour cream, as liked