Peel the patola, slice into thick roll pieces. Set aside.
Make shrimp juice by pouring 1/2 cup hot water on the shrimp shells and heads. Using a sieve, separate the shells and heads of the shrimp and collect the liquid. The liquid is the shrimp juice.
Saute garlic until brown, add onion and when it becomes soft, add the pork.
Saute again for 2 minutes, add 1/2 cup water and cover. Cook until the pork is tender.
Add shrimp and patis. Stir. Then pour in shrimp juice. Stir gently until it boils. Add the patola and MSG.
When patola is almost cooked, add the misua. Cook again for about 2 minutes and serve hot.