Step 1

In a small condiment bowl, mix together chili jam and fish sauce; set aside.

Step 2

Place water and salt in a 4-quart pot; bring to a boil. Reduce to a sub-simmer. Water should be steaming, but not bubbling. Add shrimp to pot; stir until shrimp are barely opaque, about 1 1/2 minutes. Remove with a metal spider or slotted spoon. Set aside.

Step 3

Arrange poached shrimp, dressing, shallots, cucumber, peanuts, chilis, lime, pomelo, and lettuce leaves on a large platter. To assemble and serve: place one shrimp in a lettuce leaf and a "little bit of this and a little bit of that," followed by a teaspoonful of dressing; wrap it up in one bite and consume.