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Vietnamese Caramel Fish
To make Vietnamese cá kho tộ, fish is cooked in a savory-sweet caramel sauce, both seasoning the fish and keeping it moist. To ensure our sauce was dark and savory, not cloying, we cooked the sugar a little longer, creating a darker and slightly bitter caramel. We found that a tablespoon of coconut water helped the sugar caramelize faster, getting us the deep coffee color we were after in just minutes. Keep a close eye on the caramel to prevent it from burning and becoming too bitter. Dark, oily fish are common in this dish, but we liked it better with a firm whitefish. Note that cooking times are for fillets about ¾ inch thick.
4
Servings
Don’t use canned coconut milk here. Coconut water is widely available and lends a slight sweetness and subtle coconut flavor to the caramel. If you can’t find it, use water.
30 minutes
Ingredients
-
1
tablespoon plus ½ cup coconut water
-
¼
cup white sugar
Directions
-
01In a large Dutch oven over medium-high, bring 1 tablespoon of coconut water and the sugar to a boil. Cook, stirring occasionally, until the mixture begins to color at the edges, 2 to 3 minutes. Reduce to medium-low and cook, stirring often, until the sugar is mahogany-colored, 1 to 3 minutes. Off heat, add the fish sauce and whisk until smooth (the mixture will steam and bubble vigorously). Add the remaining ½ cup of coconut water and whisk until fully incorporated. Add the shallots, ginger and zest. Return to a simmer over medium heat. Reduce the heat to medium-low and simmer gently for 5 minutes.
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I have made the caramel fish a couple times. The sauce tastes good but the caramel hardens after adding the coconut water. I am able to re-incorporate it but the sauce never thickens.