Makes approx. 3/4 cup Tom Yum paste, enough to marinate up to 4 pieces fish or chicken, OR to make 1 pot of soup

4 Tbsp. finely minced lemongrass

5 cloves garlic

1 thumb-size piece galangal, sliced

1 fresh red chili, sliced, OR 1/2 to 3/4 tsp. dried crushed chili (or substitute cayenne pepper)

1/4 cup fresh coriander

2 Tbsp. fish sauce

2 Tbsp. vegetable oil

1/2 tsp. dark soy sauce (OR substitute 1 tsp. regular soy sauce)

1/2 tsp. shrimp paste

1/4 cup fresh-squeezed lime juice

3 heaping tsp. palm sugar OR brown sugar

2 spring onions, sliced