Preheat oven to 400°F or 200°C.
Prick sweet potatoes with a fork and bake until tender. This should take around 30-45 minutes. Depending on the size of your potato.
In the meantime, cut all ingredients.
Combine kale, cabbage, grated carrots, spring onions, avocado, pumpkin seeds, and garlic in a bowl.
Whisk together the oil, lemon juice, parsley, and mustard.
Add the mixture to the vegetable mix.
When the sweet potato is tender, cut a slit and top with the mixture.Keep some of the mixture as a side dish.
Add a thin slice of brie and put the loaded potatoes back in the oven for 5 minutes.
Add remaining salad mixture to a plate and serve with loaded sweet potato on top.