01 - Combine the chicken, water, ginger, scallion whites, and salt in a large stockpot. Bring to a boil over medium heat, skimming off any foam that rises to the surface. Reduce heat to a simmer, cover, and cook for 40 minutes until the chicken is tender.
02 - Carefully remove the chicken from the pot and set aside to cool slightly. Strain the broth through a fine-mesh strainer if desired, discarding the cooked solids. Return the clear broth to the pot.
03 - Add the rinsed jasmine rice and glutinous rice to the simmering broth. Cook over medium-low heat, stirring occasionally to prevent sticking, for 30–40 minutes until the rice has completely broken down and the porridge reaches a creamy consistency.
04 - While the rice is cooking, shred the cooled chicken meat from the bones, discarding skin and bones. Set the shredded meat aside for serving.
05 - Once the porridge has reached your desired consistency, season with additional fish sauce and ground white pepper to taste. Adjust seasoning as needed.
06 - Ladle the hot porridge into serving bowls. Top each portion with shredded chicken, then garnish with scallion greens, cilantro, fried shallots, lime wedges, and optional chilies or chili oil. Serve immediately while hot.