Beef stew with dumplings

Name: Beef stew with dumplings
Ingredients: 2 tbsp olive oil; 25g/1oz butter; 750g/1lb 10oz beef stewing steak, chopped into bite-sized pieces; 2 tbsp plain flour; 2 garlic cloves, crushed; 175g/6oz baby onions, peeled; 150g/5oz celery, cut into large chunks; 150g/5oz carrots, cut into large chunks; 2 leeks, roughly chopped; 200g/7oz swede, cut into large chunks; 150ml/5fl oz red wine; 500ml/18fl oz beef stock; 2 fresh bay leaves; 3 tbsp fresh thyme leaves; 3 tbsp chopped fresh flatleaf parsley; Worcestershire sauce, to taste; 1 tbsp balsamic vinegar, or to taste; Salt and freshly ground black pepper; 125g/4½oz plain flour, plus extra for dusting; 1 tsp baking powder; Pinch salt; 60g/2½oz suet; Water, to make a dough; Mashed potato; 1 tbsp chopped flatleaf parsley