With a mortar and pestle (or food processor), pound the turmeric, coriander, garlic, chili, and shallots into a fine paste. Add a tiny bit of water if it gets too dry when pounding.
The final texture should be moist. Then stir in torch ginger flower pieces and season with salt.
Marinate the chicken pieces with half of the paste. Let it sit for 15 minutes.
In a wok, heat up 1 1/2 tbsp oil. Add in the remaining half of the paste and saute for two minutes. Add 1/4 cup water and one teaspoon soy sauce, and simmer the sauce for another three minutes or until thickened. Remove sauce and set aside.
In a bowl, mix the flour with the marinated chicken. Make sure each piece is well coated with flour.
In the same wok, add one cup of oil and heat on high. When oil is heated, turn the flame down to medium. Place chicken pieces immediately into oil and fry for a few minutes, or until golden brown (will probably need to fry 2-3 batches).
Dish out and place on paper towel. Once dry, serve immediately with sauce.