Where it comes from
Riz au yet is the most-singular dish of Senegal's Casamance region — using 'yet' (Volute or Cymbium mollusk, sun-dried and fermented for weeks until pungent and dark). The Diola people of Casamance harvest yet from the mangroves around Ziguinchor and ferment it as a winter preservation technique. The cooking method is similar to thieboudienne but the yet adds an intensely umami, almost cheese-like funk that polarizes eaters — beloved by Casamance natives, often a 'one bite is enough' for outsiders. The dish is served with bissap (hibiscus drink) to cleanse the palate. Found at every Ziguinchor restaurant and increasingly at Casamance-immigrant restaurants in Dakar.
On the plate
A spoonful of riz au yet: the rice is deep-orange from palm oil and tomato, scattered with darker mollusk chunks. The first bite is rice-and-tomato familiar; the second hits with the yet's intense umami — like aged cheese rind crossed with seafood, deeply funky in a way that some find irresistible and others can't get past. Sip the cold bissap to cleanse, then go again. The Casamance river-mangrove world on a plate.
How it works
Fermentation of yet (sun-drying mollusks for weeks) breaks down proteins into peptides and free amino acids (high glutamate, plus less-common glutamic and aspartic combinations) — these are 10× more umami-concentrated than fresh shellfish. Red palm oil contributes carotenoids that color the rice deep orange and add a subtle earthy note distinct from coconut oil. The 100g of yet flavors 6 servings — a little goes a long way.
Variations
Ziguinchor authentic version uses true yet (Cymbium mollusk fermented in mangroves); diaspora restaurants often substitute dried scallops + fermented black beans; modern Dakar Casamance restaurants offer a milder version with less yet and more shrimp for tourist palates.
On the Palate
Ingredients
Serves 6
How it's made
5 steps · Show ↓35 min active · 55 min waiting
How it's made
5 steps · Show ↓- 133 min
Soak 100g dried yet (or substitute with 100g dried scallops + 50g fermented black bean paste for similar umami) in warm water 30 min. Drain; chop coarsely.
- 28 min
In a heavy pot, heat 4 tbsp red palm oil (or coconut oil). Sauté 1 chopped onion + 4 minced garlic cloves + 1 chopped scotch bonnet (seeded for less heat) + 1 thumb grated ginger for 6 min.
- 36 min
Add 3 tbsp tomato paste + 2 chopped tomatoes + 1 tsp ground bouillon (or 1 stock cube) + 1 tsp salt + 1 tsp pepper. Cook 5 min until oil reddens.
- 417 min
Add the chopped yet + 200ml water; simmer 15 min until yet has rehydrated and contributed its broth.
- 528 min
Add 400g broken rice (or short-grain rice, rinsed) + 600ml water. Bring to boil, reduce to lowest heat, cover. Cook 18 min. Rest 10 min covered. Fluff and serve with sliced lime, fresh cilantro, and cold bissap drink on the side.
