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Wednesday, October 23, 2019

Khao Piak Sen: Lao-Style Chicken Noodle Soup that Packs A Punch



Khao Piak Sen (Lao Chicken-Noodle Soup) Recipe

Meet chicken noodle soup as it's made in Laos. While every recipe is different, it's loaded with slippery tapioca- and rice-flour noodles, layers of aromatics, and an abundance of fresh and fragrant toppings.


Inspired by the recipe of Chef Seng Lengrath of Washington D.C.’s Thip Khao, this Lao noodle soup is loaded with layers of flavor. Multiple aromatics go into the rich chicken broth, including onion, ginger, lemongrass, lime leaves, and cilantro. The handmade tapioca-and-rice flour noodles, meanwhile, are cooked directly in the broth, their excess starch helping to thicken it and give it its signature viscosity. To top it all off, an array of toppings, like fried garlic and shallots, cilantro, chilies, and scallions, allow diners to customize their bowls as desired.



Why It Works

  1. Using the oil from the fried garlic and shallots to make the broth captures every ounce of flavor.
  2. Optionally charring some of the onion and ginger adds depth and complexity to the broth.
  3. Using a stand mixer to start the noodles protects your hands from the heat of the boiling water.
  4. Cooking the noodles in the broth adds starch to the broth itself, giving it its signature viscosity.


Ingredients:

For the Fried Garlic and Shallot:
1 cup of vegetable oil (240ml)
24 cloves garlic (120g), sliced thinly crosswise, preferably with a mandoline
3 medium shallots (150g), sliced thinly crosswise into rounds, preferably with a mandoline
For the Broth and Chicken:
1 medium yellow onion (10 ounces; 280g), peeled and quartered through the root end
3 large knobs ginger (3 ounces; 90g), peeled and sliced crosswise into 1/4 inch thick rounds
3 tablespoons garlic and shallot oil (45ml), from above
1 stalk lemongrass (2 3/4 ounces; 80g), outer layer discarded then roughly chopped
6 medium cloves garlic (1 ounce; 30g), peeled and thinly sliced crosswise
5 makrut lime leaves
Stems from 1 bunch cilantro (2 ounces; 60g), chopped (see note)
One 3- to 4-pound (1.3 to 1.8kg) whole chicken, blotted dry (see note)
2 tablespoons kosher salt (3/4 ounce; 25g), plus more as needed
2 tablespoons soy sauce (1 ounce; 30g)
2 tablespoons Asian fish sauce (1 ounce; 30g)
1 teaspoon sugar

For the Noodles:
7 ounces (200g) plus 3/4 ounce (20g) white rice flour, divided (see note)
7 ounces (200g) plus 3/4 ounces (20g) tapioca flour, divided
1 3/4 cups (415ml) boiling water
To Finish and Serve the Soup:
2 scallions, sliced thinly on the bias
2 fresh bird’s eye chilies, stemmed and minced
5 sprigs morning glory, pulled through a morning glory shredder (optional; see note)
Lime wedges
Fried garlic, from above
Fried shallots, from above
Picked cilantro leaves and tender stems



Directions:

For the Fried Garlic and Shallot: 

A collage showing aromatics for khao piak sen broth: charred onion in one photo, plus the pot full of chopped lemongrass, plus lime leaves and more to make the broth for khao piak sen

1. Line a plate with paper towels and set a fine-mesh strainer over a medium heatproof bowl. In a medium frying pan, heat oil over medium heat until shimmering. Add garlic and fry, swirling and stirring frequently, until golden brown all over, approximately 4 minutes. Pour garlic and oil into a prepared strainer and allow to drain. Transfer garlic to the prepared paper towels, spreading it out in an even layer, and allow it to drain further.

2. Return oil to the pan then set a fine-mesh strainer over the same heatproof bowl. Line a second plate with clean paper towels.

3. Add shallots to the pan and cook over high heat, stirring frequently, until shallots begin to bubble about 1 minute. Continue cooking, stirring constantly as the shallots fry to ensure even cooking, until shallots turn pale golden brown, about 3 minutes longer. Working quickly, pour contents of the saucepan into a strainer set over a bowl. (Shallots will continue cooking for a brief period after draining, so do not allow them to get too dark.) Reserve garlic-shallot oil.

For the Broth and Chicken:

Adding the chicken, water, salt, and soy sauce to a pot to make the broth for khao piak sen


4. If desired, grill or sear (in a cast iron pan without oil) two of the onion quarters and two-thirds of the sliced ginger until well charred, about 2 minutes per cut side (this will add depth and complexity to the broth, but is optional).

5. Roughly chop all of the onion and ginger, whether charred or not.

6. In a large 8-quart Dutch oven or soup pot, heat garlic-shallot oil over medium heat until shimmering. Add chopped onion and ginger, lemongrass, sliced garlic, lime leaves, and cilantro stems, season lightly with salt, then cook, stirring, until onions are softened, about 7 minutes.

7. Add chicken to pot and top with at least 5 quarts (5 liters) cold water, or enough to cover. Add the 2 tablespoons kosher salt along with the soy sauce, fish sauce, and sugar. Bring to a simmer, then lower heat to maintain a gentle simmer. Cook, covered, for 2 hours, lifting lid occasionally to skim the surface of broth of any foam or scum that accumulates.

8. Carefully remove chicken from the pot and transfer to a work surface (it may fall apart after this long cooking; simply fish out all the parts and bones). When cool enough to handle, pull meat from bones and shred with your hands or a fork. Discard bones and skin. Reserve chicken meat.

9. Meanwhile, bring broth to a rolling boil and cook, uncovered, for 30 minutes. Strain broth, discarding solids, then return to cleaned pot. Season with salt.

While the broth boils, make the noodles:

Making khao piak sen dough in a stand mixer: boiling water is added, then the sough is worked with the dough hook until it comes together

10. In a stand mixer fitted with the dough hook, add 7 ounces rice flour and 7 ounces tapioca flour. Turn mixer to medium-low speed and drizzle in boiling water. Continue to mix, pausing occasionally to scrape down the sides with a flexible spatula, until moist dough ball forms, about 3 minutes.

11. Whisk together remaining rice and tapioca flours, then sprinkle on a work surface. Turn the dough ball out onto the floured work surface. Knead dough by hand until all of the flour on the board has been fully incorporated into a supple dough, about 4 minutes.

12. Roll dough into a thick log and divide into 8 equal portions. Roll each portion into a small ball, then flatten with the palm of your hand.

13. Working one dough disc at a time, and keeping the remainder covered with a kitchen towel to prevent drying, roll using a rolling pin until roughly 1/8 inch thick and about 6 inches long.

14.Using a sharp knife, slice into noodles roughly 1/4 inch wide. Transfer to a rimmed baking sheet, dusting and tossing gently with rice flour to prevent sticking. Keep noodles covered with a damp towel so they don’t dry out. Repeat with remaining dough.

To Finish and Serve the Soup: 

A bowl of Lao noodle soup khao piak sen, piled with garnishes like fresh cilantro, scallions, fried garlic, and more; additional condiments are in the background

15. Add noodles to boiling finished broth and cook, stirring very minimally to prevent them from breaking (they're brittle until they cook through), until noodles float to the surface, 1-2 minutes.

16.Transfer noodles to soup bowls. Add shredded chicken to each bowl. Ladle broth into bowls. Serve hot, allowing diners to garnish their soup with scallions, chilies, morning glory (if using), lime, fried garlic, fried shallots, and cilantro leaves and tender stems.


Special Equipment:


Notes:
If you can find it, you can also use cilantro roots. An old hen, if you can find it, works well in this recipe; otherwise, any whole chicken will be good. This recipe uses finely milled white rice flour, commonly found in Asian grocery stores. These are different than those available at most chain grocery stores because the finer rice flour is much more absorbent. Morning glory, also known as water spinach, can be found in Asian markets.

Make-Ahead and Storage
The fried garlic and shallots and the broth can be made up to 5 days in advance; refrigerate the broth until ready to use, and keep the fried garlic and shallots in airtight containers at room temperature. The noodles can be frozen for up to 1 month: To freeze, arrange in thin, even layers on parchment on a rimmed baking sheet, stacking more parchment between each layer; wrap well in plastic, then freeze. To cook frozen noodles, place directly into boiling broth without thawing and let cook 1-2 minutes longer than fresh noodles until they float to the surface.


Source: Serious Eats

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