Preheat the oven to 200°C (400°F) / fan 180°C (350°F) / gas mark 6. 2. Tightly wrap each beetroot in foil, place them on a baking tray, and bake for 50 minutes, turning halfway through. They are ready when a knife pierces them with no resistance. 3.
While the beetroots bake, make the curds.
In a saucepan, gently heat the milk, lemon juice, and salt to 40°C (105°F). Use a thermometer for accuracy; it should feel like blood temperature. If the milk gets too hot, the curds will not form properly. 4.
Remove the pan from the heat and gently stir in the rennet, stirring in one direction only.
Let the mixture rest undisturbed for 30 minutes. It will begin to look separated and scrambled—this is exactly what you want! 5.
Line a sieve with a muslin cloth or a clean tea towel and set it over a large bowl. Carefully pour the curd mixture into the cloth and let it drain for 20 minutes. 6.
Transfer the fresh curds from the cloth to a container. Save the liquid whey in the bowl for another use (it's great in smoothies or for baking bread). 7.
Once the beetroots are cool enough to handle, peel and slice them into wedges. Be sure to wear gloves to avoid stained hands. 8. To serve, arrange the beetroot wedges in a bowl, season with salt and pepper, then add generous spoonfuls of the fresh curds and a sprinkle of toasted sunflower seeds.
Don't discard the whey! This nutrient-rich liquid is a fantastic, tangy addition to smoothies, soups, or can be used in place of water when baking bread.