Mince and dumplings

Name: Mince and dumplings
Ingredients: 2 tbsp sunflower oil; 1 large onion, thinly sliced; 2 garlic cloves, finely chopped; 2 celery sticks, peeled, finely sliced; 2 medium carrots, diced; 500g/1lb 2oz lean beef mince; 1 x 400g/14oz can chopped tomatoes; 2 tbsp tomato purée; 350ml/12fl beef stock; 150ml/5fl oz red wine; Pinch caster sugar; 1 bay leaf; Salt and freshly ground black pepper; 250g/10oz self-raising flour, plus extra for rolling; 125g/5oz shredded beef suet; ½ tsp fine sea salt; 2 tbsp chopped fresh parsley