Parsnip and pear soup

Name: Parsnip and pear soup
Prep time: 25 min
Cook time: 35 min
Total time: 1 h
Cuisine: European, British
Ingredients: 2 tbsp. olive oil; 1 large onion, roughly chopped; 2 celery sticks, roughly chopped; 1 garlic clove, crushed; 1 tsp. curry powder; 1/2 tbsp. ground cumin; 2 pinches hot chilli powder; 450 g parsnips, roughly chopped; 1 L hot vegetable stock; 3 pears; 15 g butter; 1 tsp. golden caster sugar; 2 tbsp. freshly chopped flat-leafed parsley to garnish