In a medium-sized paellera (or a large, shallow round cooking pan), heat vegetable oil and sauté onions, garlic and ginger for two to three minutes or until onions are translucent and mixture becomes fragrant.
Add chicken pieces and season with rock salt. Sauté chicken until lightly browned, then remove from the pan and set aside.
Pour rice into the pan and mix well until the rice grains are coated with the oil. Pour in half of the chicken stock and continue mixing for about 1 minute, then use a sandok or a heat-proof spatula to arrange the rice evenly around the pan.
Pour in remaining stock then return the chicken pieces into the pan. Add the papaya, mushrooms and carrots, and season with patis. Let simmer for another minute.
Place sili leaves on top. Cover pan with foil (or use a pan cover) and simmer at medium-low heat for about 20-25 minutes or until rice has absorbed all of the liquid and chicken pieces are fully cooked.
Makes 4-6 servings.