Ingredients

1 can (13 1/2 ounces) coconut milk 

1 lemongrass, outer leaves removed and tender center chopped (about 1/4 cup) 

1 cup chopped white onion 

1 carrot, chopped 

5 Serrano chilies, chopped 

3 to 4 cloves garlic 

1/2 cup sugar 

Zest and juice of 1 lime 

Zest and juice of 1 lemon 

1 bulb fennel trimmed and coarsely chopped 

Coarse salt 

Preparation

Combine all ingredients plus one full can water in a medium saucepan over high heat. Bring to a boil; reduce heat to medium. Simmer for 25 minutes. Remove from heat; strain; return to heat if poaching shrimp immediately. Store, covered, in a refrigerator for up to 2 days; poaching liquid can be used several times.