Keep half of one parsnip aside. Chop the rest of the parsnips into 1 inch pieces. Add to a saucepan with the potato, garlic, onion, curry powder and stock pot. Stir in the boiling water and simmer for 10 minutes.
Chop the half parsnip you put aside, into ½cm dice. Add to an air fryer with some low-calorie cooking spray and air-fry at 180°C for 10 minutes until crisp.
After 10 minutes, finely chop the leafy part of the fresh coriander and add half to the saucepan. Simmer for a further 10 minutes.
Transfer the vegetables to a food processor or use a stick blender to blitz until thick and creamy. You may need to add some extra boiling water if it is too thick. Add the remaining coriander leaves and blitz for a further few seconds.
Serve immediately, topped with the parsnip croutons and a sprinkle of extra curry powder.