Ingredients

• 1 ¼ pounds mackerel fillets
• ½ teaspoon kosher salt, more for seasoning
• ½ teaspoon black pepper, more for seasoning
• ½ teaspoon sweet paprika
• 6 tablespoons extra virgin olive oil, more as needed
• 2 leeks, white and light green parts only, thinly sliced
• 2 carrots, peeled and thinly sliced into rounds
• 1 small red bell pepper, thinly sliced
• 1 small orange or yellow bell pepper, thinly sliced
• 5 large thyme sprigs
• 3 garlic cloves, minced
• ½ cup dry rosé or white wine
• ½ teaspoon sherry vinegar, more to taste

Preparation

1. Season mackerel with salt, black pepper and paprika. Let fillets rest at room temperature while preparing vegetables.
2. Set a large skillet over medium heat and add 5 tablespoons oil. Then add leeks, carrots, bell peppers and thyme, cooking them until they soften, about 10 to 12 minutes. Add garlic, stirring gently, and cook for 2 minutes more. Add wine and cook until most of liquid has evaporated, about 7 minutes. Season to taste with more salt, pepper and sherry vinegar, then transfer to one side of a serving platter.
3. Wipe the skillet with a paper towel, add remaining oil, and set over high heat. When oil is hot, add mackerel in one layer, skin side down. Cook for 3 minutes, then flip and cook for 1 to 2 minutes longer, until fish is cooked through. Add fillets to platter and spoon vegetables on top of fish.