Masor Tenga Mango

Ingredients

• - 500g fish pieces
• - 1 raw mango cut into pieces
• - 1 onion
• - 3 garlic cloves
• - 1 tsp turmeric
• - 1 tsp chilli powder
• - 2 tbsp mustard oil
• - Salt
• - Coriander

Method

1. About Masor Tenga Mango: Raw mango replaces tomato as the souring agent in this summer version of Masor Tenga, the iconic Assamese tangy fish curry. The mango gives a fresher, fruitier tartness than the more common ou tenga (elephant apple) version, making this dish particularly refreshing in Assam's humid summer months. It is the seasonal choice when raw mangoes flood the markets in May-June.
2. Understand the seasonality: This dish is specifically a summer recipe — raw mangoes are available primarily from April to June in India. Outside of mango season, you can substitute with ou tenga (recipe id 1215 uses this), tamarind, or even green plums for similar effect.
3. Choose the right mango: Use 1 raw, hard, green mango. The skin should be deep green with no yellow patches; press it, and it should feel rock-hard. The mango varieties used for pickling work best — Ramkela, Lakhanbhog, or any firm pickling mango. Avoid eating-mango varieties (Alphonso, Kesar) — they are too sweet and soft.
4. The sour test: Taste a small piece of the raw mango. It should be intensely sour — almost mouth-puckering. If it tastes only mildly sour, add 1 tbsp tamarind paste at the end of cooking to compensate.
5. Prepare the mango: Wash and peel the mango. Cut into 2cm cubes around the stone. You should get about 1 cup of cubes from one medium mango. Discard the stone.
6. Choose firm fish: Use 500g of fresh fish pieces. Best choices are Rohu (the prized Assamese river fish), bekti, tilapia, or any firm freshwater white fish. The fish must be firm enough to hold up to simmering.
7. Clean and pat dry: Rinse the fish pieces under cold running water. Pat very dry with kitchen paper.
8. Marinate the fish: Place the fish pieces in a wide bowl. Add 1 tsp turmeric powder and 1 tsp salt. Massage the marinade into every piece. Let marinate for 15-20 minutes at room temperature.
9. Prepare the onion: Take 1 medium onion. Peel and chop into fine 5mm dice.
10. Prepare the garlic: Take 3 garlic cloves. Crush, peel and mince finely.
11. Use a wide pan: Use a wide flat heavy pan or non-stick frying pan.
12. Heat the mustard oil correctly: Pour 2 tbsp mustard oil into the pan. Place over medium-high heat. Heat for 1-2 minutes until smoking heavily.
13. Fry the fish first: Carefully slide the marinated fish pieces into the smoking-hot oil, away from yourself.
14. The critical first sear: Do not move or touch the fish for the first 3-4 minutes. After 4 minutes, the bottom should be deep golden brown.
15. Flip carefully: Use a flat spatula to slide under each piece and flip. Cook the second side for another 3-4 minutes until equally golden.
16. Lift the fish out: Use a slotted spatula to carefully remove the fish from the pan. Set aside on a plate.
17. Fry the onion: To the same oil add the chopped onion. Stir-fry on medium heat for 6-7 minutes, stirring often, until deep golden brown.
18. Add the garlic: Add the minced garlic. Stir for 1 minute until fragrant.
19. Add dry spices: Sprinkle in 1 tsp turmeric powder and 1 tsp red chilli powder. Stir for 30 seconds — the masala will turn a beautiful rust-red colour.
20. Add the raw mango: Add the cubed raw mango pieces to the pan. Stir to coat with the masala.
21. Add water for the broth: Pour in 1 cup of hot water. Stir well.
22. Boil the mango: Bring to a boil over medium-high heat. Boil uncovered for 5 minutes — the mango will start softening and releasing its sourness into the broth. The water will turn a faint yellow-green colour as it absorbs the mango character.
23. Check the mango softness: After 5 minutes, the mango cubes should be tender but still hold their shape — softened around the edges, firm at the centre.
24. Return the fish: Carefully slide the fried fish pieces back into the simmering broth. Spoon some broth over each piece.
25. Final simmer: Reduce heat to medium-low. Simmer uncovered for 10 minutes, gently spooning broth over the fish every 3 minutes. The fish will fully cook through and absorb the bright mango sourness.
26. Check doneness: The fish is done when the flesh easily flakes with a fork. The mango cubes should be soft but still mostly intact. The broth should be moderately thin — masor tenga is a thin-broth dish.
27. Final flavour adjustment: Taste the broth. The dish should hit you with multiple flavours — clean fish, fresh fruity sour mango, gentle chilli warmth, pungent mustard oil. The mango sourness should be present but not overwhelming.
28. Adjust the sourness: If not sour enough, mash one mango cube into the broth. If too sour, add 1/4 tsp sugar to balance.
29. Garnish and serve: Switch off the heat. Sprinkle 2 tbsp finely chopped fresh coriander over the top. Serve hot over plain steamed rice.
30. The Assamese way to eat: The traditional way to eat masor tenga is to mix the broth generously into rice with your fingers, breaking off small pieces of fish to combine. Some Assamese also crush a few mango pieces into the rice for extra fruity sourness.
31. The summer cooling effect: Masor tenga is specifically a summer dish — the sourness from the raw mango has cooling properties in Ayurvedic terms and helps stimulate appetite during humid weather when heavy spiced food can feel oppressive.
32. For a complete summer meal: Pair with a simple dal, mustard greens (recipe id 1299) on the side, and plain yogurt. The bright tangy fish balances rich greens and creamy yogurt beautifully.
33. A cultural and seasonal note: Each spring, when raw mangoes appear at Assamese markets, masor tenga mango becomes the dish of the season. It is so closely tied to mango season that some Assamese consider it not just a recipe but a celebration of mango harvest. Eating this dish in May-June connects you to the seasonal rhythm of Assam's agricultural year.
34. Leftover storage: Stored in the fridge in an airtight container, this dish keeps for 1-2 days. The mango character mellows beautifully overnight. Reheat very gently on the stovetop with a splash of water — never microwave at high power, which can break the fish.