Mulligatawny soup

Name: Mulligatawny soup
Ingredients: 20g butter; 2 tbsp olive oil; 1 onion, finely chopped; 2 celery sticks, chopped; 3 carrots, peeled and chopped; 1 parsnip, peeled and chopped; 2 garlic cloves, chopped; 1 thumb-sized piece ginger, peeled and grated; 1 eating apple, cored and chopped; 1½-2 tbsp medium curry powder; 1 tsp ground cumin; ¼ tsp sweet smoked paprika; 1.2l hot chicken stock; 1 tbsp tomato purée; 100g basmati rice; 1 tbsp mango chutney; ½ lemon, juiced; ½ small bunch of coriander, shredded; yogurt, to serve