Caramelized Onion Fish Fillets Recipe

Ingredients

Estimated total cost: €19.67 · €3.28/serving

• 1 substantial white onion, thinly sliced (for a more delicate flavor, caramelize the onions before adding to the dish)Est. price €0.20–€0.50
• Salt and freshly ground black pepper (season to taste)Est. price €0.02–€0.05
• 1/2 cup plus 2 tablespoons of freshly squeezed lime juice (use fresh lime juice for a vibrant citrus flavor)Est. price €0.40–€0.80
• 1/4 cup of extra virgin olive oil or another high-quality oil (opt for a fruity olive oil for an extra layer of flavor)Est. price €0.60–€1.20
• 1 1/2 to 2 pounds of grouper fillets or another robust fish variety, cut into 2 or 4 portions (pat the fish fillets dry before cooking for a crispy exterior)Est. price €18.00–€30.00
• 6 cloves of garlic, thinly sliced (lightly toast the garlic slices for a nutty aroma)Est. price €0.30–€0.60
• Freshly chopped cilantro leaves for garnishing (add the cilantro just before serving to preserve its fresh flavor)Est. price €0.15–€0.30

Steps

1. 1

   Begin by peeling and thinly slicing the onion. Season generously with salt and mix well. Allow it to rest for approximately half an hour before rinsing off the excess salt. Finally, drizzle 2 tablespoons of lime juice over the onion slices and toss gently to combine.

2. 2

   In a large nonstick skillet, heat 3 tablespoons of oil over medium-high heat. Place the fish in the skillet without flipping it and season with salt and pepper. Cook until one side is nicely browned, about 4 to 5 minutes. Carefully turn the fish over and reduce the heat to medium. Allow it to cook until tender; you will know it's ready when a thin-bladed knife easily pierces through the thickest part, typically taking 2 to 5 minutes more based on its thickness. Once done, transfer the cooked fish to a warm platter for serving.

3. 3

   In the skillet, pour in the rest of the oil and add the garlic. Stir constantly as you cook until the garlic starts to turn golden, which should take less than a minute. Turn off the heat, then mix in the remaining 1/2 cup of lime juice. Stir well, making sure to scrape any bits from the bottom of the pan to blend with the garlic, lime juice, oil, and any remaining solids. Taste it and season with more salt and pepper if needed. Drizzle this mixture over the fish, sprinkle cilantro on top for garnish, and serve alongside sliced onion.

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• Cultural note

  Caramelized onion fish fillets combine the technique of caramelizing onions, which originated in France, with cooking fish, a practice found in various cuisines around the world. The use of lime juice and cilantro hints at a fusion of Mediterranean and Latin American flavors in this dish.

• Seasonal note

  This dish can be enjoyed year-round as fish, onions, and olive oil are generally available throughout the year. However, grouper tends to be more abundant and flavorful during the warmer months when it is in peak season.

• Health note

  This dish is a good source of protein, healthy fats, and vitamins. The grouper provides high-quality protein while the olive oil adds heart-healthy monounsaturated fats. The caramelized onions offer a good amount of fiber and vitamin C.