Recipe "A new pumpkin laksa for a cold night" from "Tender: A Cook and his Vegetable Patch" by Nigel Slater.
I have tried this recipe twice, and I suggest several changes.
First, if you use regular canned coconut milk, then there is way too much coconut milk in this recipe; I suggest eliminating the coconut milk entirely or only using a small dollop. Alternatively, as I did in attempt #2, you can dilute the coconut milk with more stock (I used 32 oz more then asked for in the recipe), but you'll need to increase the fish stock (about 1 Tbsp more), soy sauce (about 1 Tbsp more), and citrus juice (the juice from 1/2 - 1 more limes) accordingly; on the second day, the coconut milk mellowed out, and the soup was pretty enjoyable. I'm beginning to suspect that I might not like canned coconut milk in soups since it is too cloying and heavy. This soup is better if you make your own coconut milk from shredded coconut flesh. In my third attempt, I used 1 1/2 cups fresh coconut flesh, and two soakings with 1 1/2 cups hot water. This diluted the soup a little bit too much. Next time I would either only use the coconut milk from the first hot water soaking, or perhaps only use 1 cup of coconut with two soakings.
Second, Slater doesn't explain how to prepare the lemon grass. You are supposed to cut off about 1/2 inch to 1 inch from the bottom and discard the hard outer layers and the dried out tops just before the lemongrass branches. Use the "main stalk", which should be yellow. You should use the bottom 3 to 4 inches of the remaining part of each stalk.
Third, my blender can't pulverize the lemon grass spice paste (which incidentally is very similar to a green curry paste, even though Slater doesn't mention this) finely enough, so after you have simmered the spice paste with stock and coconut milk (but before you add the pumpkin and noodles), I passed the soup through a chinoise (use a fine mesh strainer, or a regular strainer lined with cheese cloth if you don't have one), in order to remove any grit from the soup. Also since my ginger was a bit old, and had a fibrous hairy texture, I grated the ginger and only used the squeezed ginger juice in the recipe, though this ended up not mattering since I strained the soup anyways.
Fourth, you should use kabocha squash as the pumpkin in this recipe. It is okay to use meyer lemon juice instead of lime juice. I used Thai basil instead of cilantro, since I don't like cilantro.
Fifth, you can use mung bean noodles (bean threads / clear noodles), rice noodles (thick rice noodles are nice), or wheat based noodles. The soup also goes well with white rice--serve on the side and people can either pour soup over the rice, eat the rice plain to contrast with the soup, or they can put the rice into the soup. If you have leftovers, you can leave the pumpkin in the soup overnight; in fact this will actually help to get pumpkin flavor into the broth (the broth will turn from green to an appealing bright fiery orange). However, don't leave the noodles or rice in the soup overnight, since they will expand, become soggy, and soak up all the broth.
With that said, the spicy, salty, fishy, sour taste of this soup is addictive (it is inspired by southeastern asian cooking).
