1. Peeled prawn shell marinate with all ingredients put on lemon grass stick. Melt butter tossed till cooked.
2. For Kaffir lime sweet potato
3. Boiled sweet potato peeled and mash .Heat butter add milk and cream make it warm add sweet potato, kaffir lime leaf and seasoning.
4. Mix well till become smooth paste. Keep aside

For Crispy Rice:

1. Boiled water in sauce pan add rice and rice wine cooked till tender.
2. Make round shape cake dry in micro oven for 10 minutes heat oil and deep fried till crispy and brown.

For Tom Yum Sauce:

1. Mixed all ingredient excepted coconut milk and cooking oil.
2. Blend it smooth fine paste.
3. Heat oil add paste cook till oil separate add coconut milk then cook for 5 minute strain it make smooth sauce.

Note: Tom yum paste can be found in Asian glossary store

Assembly
To serve, place one of the crispy sticky rice on top sweet mash potato, Mound of Lemon grass king prawn skewer pieces Spoon the warm tom yum sauce around the plate, garnish with diced red pepper and chopped herbs.