This dish features tender white fish fillets and succulent shrimp, all smothered in a rich, spicy annatto sauce. Served with a tangy habanero-infused red onion side, it's a flavour explosion that’s perfect for a Mexican-inspired lunch.
Preheat the oven to 350°F (175°C).
In a blender, combine water, onion, achiote paste, juices of 2 limes, white vinegar, juice of 1 orange, garlic, oregano, salt, and ground black pepper. Blend until smooth.
Season both sides of fish fillets with salt and ground black pepper. Brush the tops with melted butter and place them in a baking dish. Add the shrimp on top, then pour the achiote sauce over the shrimp.
Cover the baking dish with aluminum foil and bake until the fish flakes easily with a fork, about 30 minutes.
In a glass bowl, combine habaneros, red onion, water, lime juice, orange juice, salt, peppercorns, and dried Mexican oregano. Stir well.
Serve the fish and shrimp with the achiote sauce, then top with the habanero sauce.
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