Cut the pork loin into half-inch cubes.

In a bowl, combine the fish sauce and oyster sauce. Add the pork and mix well. Cover, refrigerate and marinate for at least an hour.

Cut off the roots and dark green portions of the lemongrass, and discard.

Peel off and discard the outer layer of the remaining (light-coloreportion of the stalks to get the usable part. Lightly pound the usable part and mince.

Peel the skin off the ginger, then mince.

Smash the garlic cloves, shake off the skins and discard. Mince the garlic.

Cut off and discard the top part (with the stem) of the chilies. Split in the chilies in half, scrape off and discard the seeds (unless you want your dish to be super spicy) before mincing.

Set the stove to medium-high. Heat up a large thick-bottomed pan and pour in the oil.

Sauté the lemongrass, ginger, garlic and chilies, until just starting to turn brown.

Add the pork. Stir then spread them out in a single layer. When the pork changes color, flip them over.

Add a cup of water. Stir. Cover and simmer for 15 minutes. Turn up the heat and allow to boil uncovered to reduce the liquid.

Tear the mushrooms apart into bite-size pieces.

Add the mushrooms to the pork, stir, and place a sprig of basil on top. Cover the pan tightly.

Count ten seconds then turn off the heat. Wait ten minutes before lifting the cover. The pork should be done at this point.

Scoop out the contents of the pan and transfer to a shallow bowl. Optionally, garnish with fried shallots and cilantro before serving.