You can either use pre-cooked beetroot from the grocery store or roast them yourself, however this takes a bit longer! How to roast your beetroot: Preheat your oven to 200°C (400°F). Wash the beetroots thoroughly, leaving the skin on. Place them on a baking tray and roast for 40-50 minutes, or until tender when pierced with a knife. Remove from the oven and let them cool slightly. Once cool enough to handle, you can peel off the skin (it should slide off easily) or leave it on for extra nutrients, and cut the beetroots into bite-sized cubes. Set aside.