Destination
Kigali
The story
"Big fish" is what Kigali restaurants call a whole grilled tilapia from Lake Kivu or Lake Muhazi: a fresh whole fish (usually 500g to 1kg), scaled and gutted, scored diagonally on both flanks, rubbed with a paste of garlic, ginger, green chili, lime juice, olive oil and salt, then grilled hard over glowing charcoal until the skin blisters into a dark-charred crust and the flesh inside is just cooked through. Served whole on a big plate with a mound of ugali, matoke, or fried mizuzu plantain, plus a bright kachumbari salsa on the side. Sold at every Kigali lakeside restaurant, at Lake Kivu tourist grill counters, and made at home in every household with access to a charcoal grill.
Method
Scrub the fish inside and out with coarse sea salt to remove any slime and clean the surface. Rinse thoroughly and pat dry. Score the fish 3 or 4 times diagonally on each flank, cutting through to the bone.
Combine all marinade ingredients in a bowl. Whisk into a thick paste.
Rub the marinade all over the fish, working into the scores on both flanks and inside the cavity. Rest 15 minutes at room temperature (do not marinate longer — lime juice starts to cure the flesh).
Heat a charcoal grill until the coals are white-ashy. A heavy cast-iron ridged pan on the highest heat is the practical indoor substitute. Brush the grill lightly with oil.
Lay the fish on the hot grill. Cook 6 to 7 minutes on the first side without moving (moving early causes the skin to stick and tear). Flip carefully with two fish spatulas. Cook 5 to 6 minutes on the second side. The skin should be dark-charred in patches, the flesh should flake easily at the thickest part.
Lift onto a warm platter. Sprinkle with coarse sea salt while glistening. Rest 3 minutes so the juices redistribute.
Bring the fish whole to the table on a big platter with ugali, matoke or mizuzu on the side, plus a bowl of kachumbari and lime wedges. Diners pull flesh off the bones with forks or fingers, dipping in kachumbari.
Once one side is picked, flip the fish with two spatulas to reveal the other side. It's traditional to eat every scrap; the tail and head crunch are considered the best bits.
Tips
- Very fresh fish. Grilled tilapia exposes every fault. The eyes should be bright, the skin should be shiny, the flesh should be firm. If the fishmonger has whole tilapia on ice from that morning, buy it.
- Score deep. All the way to the bone on both flanks. Shallow scores don't let the marinade penetrate; deep scores allow even cooking.
- Two spatulas for the flip. A whole grilled fish is fragile. Use two wide spatulas (or a fish spatula plus tongs) to lift and flip in one motion.
- Short marinade. Fifteen minutes maximum. Lime-based marinades start to cure fish flesh; keep it short and the fish stays firm.
- Ugali on the side. This is the classical Rwandan pairing. Rice is fine but ugali (or matoke) is the tradition.
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