Grilled then onion-lemon-marinated fish over rice — the seafood form of yassa, Casamance coastal default.
Casamance river-and-coast cooking, Diola origin; the technique grilled-then-marinated reverses the chicken yassa order to keep fish from drying in the long onion cook.
Thiof (Epinephelus aeneus, dusky grouper) is the prestige fish; overfishing has driven Senegal's stocks down 75% since 1990, so kitchens substitute mérou (white grouper) or mulet (mullet). Restaurant Chez Mamane in Ziguinchor (since 1978) grills over Casamance wood charcoal only.
Fish skin charred and crisp from the grill, flesh still moist beneath the onion blanket, the sauce now infused with grill-smoke. Lemon sharper than yassa poulet, since the cook is shorter; chili upfront. Rice catches everything.
Whole fish (typically captain or thiof grouper) marinated 30 min in lemon-Dijon-onion, grilled over wood charcoal till skin blackens; onions cooked separately to deep-caramel 40 min; fish lowered onto onions only 5 min to marry. The grill-first step is non-negotiable.
Variations
Casamance grilled (default, whole fish), Saint-Louis pan-fried version, the Gorée Island restaurant Chez Tina version that finishes under broiler not grill, and the Dakar takeaway form that uses fish steaks for portability.
On the Palate
Where Yassa Poisson sits in the Senegalese flavor cloud
Ingredients
Serves 4
How it's made
3 steps · 46 min
- 116 min
Grill 1 whole fish on charcoal 8 min per side; flake into chunks.
Watch outGrill skin-side first over glowing charcoal until the skin blisters and chars in spots — that smoky blackened skin is the whole point; don't finish it in the pan.
- 225 min
Sauté 6 sliced onions in oil + 6 garlic + 60 ml lemon juice + 1 tbsp mustard 25 min until deep gold.
Watch outCook the onions low and slow until they collapse to a deep amber jam — if they're still pale and sharp they'll taste raw against the fish.
- 35 min
Add fish chunks to onions; warm 5 min; serve over rice.
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