Prepare 1/2 fried chicken and season with turmeric and salt.
Heat oil in a wok or pan and fry the bird's eye chilies until fragrant.
Add 4 garlic cloves, minced shallot, and minced fried shallots. Stir-fry until fragrant.
Add 1 tablespoon beef stock powder and continue cooking for a few minutes.
Pour in enough water to make a sauce and bring to a simmer.
Add the tomato sauce, oyster sauce, and fish sauce. Cook for another few minutes.
If needed, add more water to adjust the consistency of the sauce.
Add petai if using, then add the fried chicken pieces. Stir well until evenly coated with the sauce.
Cook for 5-6 minutes or until the chicken is fully cooked.
Season with lime leaves and tomato slices. Cook for another minute or two to blend flavors.