Thinly slice the sweet potato. The chips won't be as crispy as regular ones, but making slicing them as thinly as possible goes a long way.
2
Place the sweet potato slices on a baking tray lined with baking paper and bake in the oven at 220 degrees celsius for about 15-20 minutes. Flip them halfway through.
3
Mince the garlic and chili, and add to a bowl along with the avocado and sour cream. Mash with a fork or immersion blender and season with salt, pepper and lime juice.
4
Fry kidney beans in a frying pan together with taco seasoning and a small splash of water, until the kidney beans are hot and the water is absorbed.
5
Top the sweet potato nachos with taco beans, avocado dressing, finely chopped spring onion and chili.