1. Combine fish sauce, lime juice, garlic, sugar and chilli paste and stir till sugar is dissolved.
2. Take the fresh crabs, steam for 30 mins or until cooked.
3. Remove crab meat from the cavity/shell being careful not to crack or break the shells.
4. Mix this crab meat, ground pork/beef/chicken, chopped prawns/shrimps, green onions, coriander leaves, garlic, fish sauce, corn starch, soya sauce, black pepper, chili paste, salt and egg. Stuff shells with thie mixture and deep fry until golden brown.
5. Drain excess oil out on paper towels and serve with thai chili sauce, soya-chili or garlic-chili paste.

Tip: If the shells break, just form cakes of the cooked meat mixture and fry; serve as above.