Tom Kha Gai: Aromatic Hot and Sour Soup with Coconut Milk

I think the hardest thing about making Thai food at home may be finding the ingredients. You can find some things at your local grocery store. It’s a whole lot easier if you have a local Thai/Viet market, but even then, things may still be unavailable (like the time kaffir lime leaves were unavailable for months here in Portland).



When I visit my local Thai market, I like to purchase extra quantities of herbs and store them for future use. Here are some examples:

• Galangal looks kinda like ginger. Its fibers are denser, making it harder to grate. It’s usually found refrigerated in a large tub of water. Once I get home with it, I will slice it into semi-thick slices, wrap them in plastic wrap in usable portions, and then throw them into a Ziploc bag in the freezer. They keep almost forever that way.
• Lemon grass can usually be found in any well-stocked supermarket, making it easy enough to pick up any time I need it. However, if there is a particularly fresh looking batch, I’ll purchase a lot. They freeze beautifully. I recommend trimming before freezing.
• Kaffir lime leaves (aka makrut) also freeze beautifully. I bought my own tree, but it’s not mature enough to give many leaves. Luckily mom brought down a gallon-sized Ziploc bag this last summer. I just threw them all in my freezer.
• Chilies also freeze well. I just throw them in the freezer whole and grab as many as I need.
• Coriander roots are hard to find, even at my local Asian markets. I grew some last year just to harvest the roots, but that wasn’t enough for more than 2 or 3 dishes. When I find it at the Thai store, I will buy every last bunch. Amazingly they can be frozen! Cut them with about 2 inches of stem attached and clean them well. Dry them well before freezing, otherwise they will get freezer burn. I also like to press them into that special blue freezer wrap by GLAD to keep out extra air. A proper food sealer would be even better (Hubby, this is a hint to you, if you are reading).

One of the best and easiest examples of cooking with Thai herbs is hot and sour soup with coconut milk. It’s aromatic, spicy, and sour with just a hint of sweetness. Wonderful for these cold winter days here in Portland. Even though this soup is a cinch to make, I like to start it after lunch and let it simmer for about an hour. Then I’ll let it sit until dinnertime to allow the flavors to meld. I don’t add the chicken until I’m ready to serve.

Tom Kha Gai
Feeds 4

• 1 x 14 oz can regular or lite coconut milk
• 2 stalks lemon grass, whites only, slightly crushed
• 2 inch x 2-inch piece of galangal, cut into thick slices
• 4 or 5 Asian shallots, peeled and cut in half (or 1 large French shallot in wedges)
• 10 kaffir lime leaves, crushed between your fingers to release aroma
• Thai chilies to taste, cut lengthwise
• 3 ½ cups chicken stock (or two 14 oz canned broth, low sodium recommended)
• 2-3 tbs fish sauce, more taste
• 1 to 2 tbs brown sugar, to taste
  
• 3 to 4 tbs fresh lime juice, more to taste
• oyster mushrooms, shredded (about ½ cup to 1 cup)
• 2 roma tomatoes, seeded and cut into thin wedges (optional)
• meat from 3 or 4 chicken thighs (or two breasts), sliced
• cilantro for garnishing

Put the coconut milk, lemon grass, galangal, kaffir lime leaves and shallots in a large pot and bring to a boil over medium-high heat. Allow to boil for about 5 minutes. Add the chicken broth, fish sauce, brown sugar and lime juice. Once it comes to a boil again, turn down the heat to low and allow it to simmer uncovered for at least 30 minutes. Add the mushrooms and continue to simmer for another 10 minutes, or until the soup comes back up to a simmer. Adjust the seasonings by adding more lime juice, fish sauce or sugar to suit your taste. Lastly, add the chicken and tomatoes, give the soup a quick stir, and allow to simmer for a final 10 minutes. I really insist that you do not stir the soup during this time, otherwise, the meat will harden. Just let it poach undisturbed. Once the chicken is cooked through, you’re done! Allow it to cool a little before serving. I find it’s hard to enjoy the flavors when the soup is so hot, it burns my tongue. Serve garnished with cilantro leaves. If I serve this as a main meal, I usually put out steamed rice or sticky rice to make it heartier.