To make filling: Heat oil and fry garlic till fragrant. Add prawns and all shredded and sliced vegetables. Cook till vegetables turn soft. Add seasoning and cook till gravy is almost dry. Remove cooked vegetables and strain to separate gravy stock.
Place two tablespoonfuls of filling on a piece of popiah skin. Roll up neatly. Arrange popiah in a tray. Pour sauce over and serve with garnish of chopped spring onions, coriander and shallot crisps.