Shorshe Ilish (Bengali Hilsa in Mustard)

About This Recipe

Shorshe Ilish is the most celebrated dish in Bengali cooking, eaten on both sides of the border to mark monsoon, Pohela Boishakh, and Saraswati Puja. Hilsa (ilish), the silver river fish prized above all others, is bathed in a paste of yellow and brown mustard seeds, green chili, and turmeric, then briefly steamed or simmered in mustard oil until just cooked through — the flesh should still tremble. The dish is fiercely simple: five core ingredients, fifteen minutes of cooking, and decades of grandmotherly judgment about how much chili the mustard can carry before turning bitter. Served with a mound of steamed gobindobhog rice and a wedge of lemon, it is a once-a-week ritual across Kolkata and Dhaka households.

Ingredients

Serves 4

• 6 steakshilsa (ilish), bone-in, 2 cm thick (substitute: shad or oily mackerel)
• 3 tbspyellow mustard seeds
• 1 tbspbrown mustard seeds
• 4green chilies, plus 2 whole for garnish
• 1 tspsalt
• 1 tspground turmeric, plus 0.5 tsp to rub fish
• 5 tbspcold-pressed mustard oil
• 300 mlwarm water
• 0.5 tspsugar (optional, to round the mustard)

Instructions

1. 1

   Soak the seeds

   Soak both kinds of mustard seeds together in 100 ml warm water for 15 minutes — this softens them and reduces bitterness.

2. 2

   Rub the fish

   Pat hilsa steaks dry. Rub with 0.5 tsp turmeric and a pinch of salt. Rest 10 minutes.

3. 3

   Make mustard paste

   Drain seeds. Grind with green chilies and salt in a small grinder or mortar, adding 2–3 tbsp water, into a smooth pale-yellow paste. Strain through a fine sieve if you want maximum smoothness.

   Don't over-grind hot — friction heats the mustard and makes it bitter. Pulse, rest, pulse.

4. 4

   Bloom mustard oil

   Heat mustard oil in a wide pan over medium-high until it just starts to smoke — this kills its raw pungency. Reduce heat to medium.

5. 5

   Sear fish lightly

   Slip fish into the hot oil for 30 seconds per side, just to firm — do not brown. Lift out and set aside.

6. 6

   Combine

   Lower heat. Whisk mustard paste, turmeric, sugar, and warm water into the pan. Bring to a gentle simmer for 2 minutes.

7. 7

   Poach the fish

   Slide fish back in. Add the 2 whole green chilies. Simmer uncovered 5–6 minutes, basting gently, until fish is just cooked through. Do not stir — Bengali cooks tilt the pan instead.

8. 8

   Rest and serve

   Drizzle a teaspoon of raw mustard oil over the top. Cover and rest 3 minutes. Serve hot over steamed gobindobhog or basmati rice.

Variations

• •

  Bhapa ilish: same paste, steamed in a sealed container over rice in the same pot.

• •

  Add a tablespoon of grated coconut to the paste for a Dhaka-style version.

• •

  Some Bangladeshi cooks add poppy seeds (posto) to round the mustard's edge.

Storage

Best eaten the day it's made. Refrigerate up to 24 hours; reheat very gently in a covered pan with a splash of water. Mustard gravy turns sour if left longer.

Frequently Asked Questions