1Preheat oven to 220 °C/200 °C fan-forced. Line an oven tray with baking paper.
2Peel sweet potato and carrot and coarsely chop all vegetables (about 2cm pieces). Place on tray and drizzle with oil; tossing to coat.
3Bake for 35-40 minutes until tender. Transfer to a bowl and add ¾ cup (185ml) -1 cup (250ml) fresh boiled water. Puree with a stick blender until smooth.
4Tip: Parsnip will take the longest to cook, so once that is tender the rest will be too.