Prepare the jasmine rice according to package instructions and set aside.
In a large mixing bowl, combine fish fillets with coconut milk, tapioca starch, 1 thinly sliced shallot, minced garlic, turmeric, white pepper, and half of the water chestnuts (if using). Mix well and let marinate for 10 minutes.
For the cucumber salad, slice the cucumbers into thin ribbons and toss with rice vinegar, sugar, salt, and remaining sliced shallots. Set aside to marinate for at least 15 minutes.
Steam the fish mixture in banana leaves according to your steamer's instructions, approximately 8 10 minutes.
Once cooked, remove the fish from the banana leaf and garnish with fresh cilantro before serving.
Serve Amok Trei alongside jasmine rice and cucumber salad.
Chef’s Insight
The balance of flavors in this dish is key to its success - the fish marinade imparts a subtle sweetness, while the cucumber salad brings a refreshing tanginess.
Notes
For an authentic Cambodian experience, use fresh banana leaves when available.