In a large bowl, mix together kroeung paste, ¾ cup coconut milk, fish sauce, prahok, egg and salt. Add the fish and combine well. Set aside and marinate at room temperature for 15 minutes.
To prepare banana leaf bowls:
While fish is marinating, wipe each banana leaf with a wet cloth. Using a pair of tongs, hold each leaf over a hot flame until leaf changes in color and becomes glossy and pliable. Make 4 banana leaf bowls by stacking 2 banana leaves on top of each other and folding into little rectangular bowls, holding the sides together with toothpicks.
To assemble amok:
Make a bed of Chinese broccoli in the bottom of each banana leaf bowl. Divide the fish and marinade among the bowls on top of the broccoli. Spoon remaining ½ cup coconut milk on top of fish, dividing equally among the 4 bowls. Top with kaffir lime leaves and red bell pepper slivers.
To cook amok:
Assemble steamer by filling a wok or large saucepan to just under the level of a bamboo or metal steamer rack. Bring water to a boil. Place the filled amoks in the steamer, cover tightly and steam 20 minutes, or until fish is cooked through. Serve with steamed rice.
*Find the Kroeung (Khmer Curry Paste) recipe here.