Preheat oven to 200°C (180°C fan).
Rub the sweet potatoes with olive oil and season lightly with salt and pepper.
Roast for 45–50 minutes until tender.
Allow them to cool slightly, then cut in half lengthwise.
Scoop out most of the flesh, leaving a thin layer attached to the skin.
Return the skins to the baking tray and bake for another 10–15 minutes until crisp.
Blend feta, Greek yogurt, olive oil, lemon juice, and black pepper until smooth and creamy.
Dice the avocado and set aside.
In a small saucepan, combine honey, chili flakes, lime juice, and salt.