Pre heat the oven to 180 C / 350 F.
Put the cream cheese in a mixing bowl and soften in the microwave for 1 minute.
Add the mayonnaise, sour cream, spring onion, lime juice, garlic, salt and sugar and 40 gm of cheese. Combine well with a spatula.
Add the crab meat to the bowl and gently fold it into the mixture.
Taste check and adjust to your preferences.
Place the mixture into the baking dish and sprinkle over the remaining grated cheese.
Bake in the oven for 25 minutes or bubbling and golden on top.
Once done, take out of the oven and let it cool for a few minutes.
Drizzle the sweet chilli sauce over the top and garnish with spring onions.