Pan-Seared Fish Yassa with Caramelized Onions and Lemon

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A savory Senegalese-inspired dish featuring pan-seared white fish in a tangy, lemony onion marinade. This African-inspired seafood recipe, ready in about 50 minutes, pairs yellow onions, garlic cloves, fresh lemon juice for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 300 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 15 min Cook: 35 min Serves 4 African cuisine 300 cal/serving
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Ingredients

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Instructions

  1. Step 1: In a large bowl, combine 3 large thinly sliced yellow onions, 3 minced garlic cloves, 1/3 cup fresh lemon juice, 2 tablespoons Dijon mustard, 2 tablespoons white vinegar, 1 teaspoon black pepper, and 1 1/2 teaspoons salt. Stir well and add 2 bay leaves.
  2. Step 2: Add 4 white fish fillets (about 6 oz each) into the marinade, cover, and refrigerate for at least 1 hour to let the flavors infuse.
  3. Step 3: Heat 2 tablespoons olive oil in a large skillet over medium heat. Add the marinated onions from the bowl and cook, stirring frequently, for 15-20 minutes until onions are soft and caramelized.
  4. Step 4: Remove onions from skillet and set aside. Add remaining 2 tablespoons olive oil to the same skillet and heat over medium-high heat.
  5. Step 5: Remove fish fillets from marinade (reserve marinade liquid) and sear fish in the hot skillet for 3-4 minutes per side until golden brown and cooked through.
  6. Step 6: Return caramelized onions and reserved marinade liquid to the skillet around the fish. Lower heat to medium-low and cook together for 5 minutes until sauce slightly thickens.
  7. Step 7: Garnish with 1/4 cup chopped parsley and serve immediately with steamed rice or couscous.

Frequently asked questions

How long does Pan-Seared Fish Yassa with Caramelized Onions and Lemon take to make?

Total time is about 50 minutes (15 min prep + 35 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Pan-Seared Fish Yassa with Caramelized Onions and Lemon?

Refrigerate in a covered airtight container for up to 3–4 days (FDA FoodKeeper guideline for cooked fish). Store any fresh salsa or citrus-based garnish in a separate container — it keeps for up to 2 days. Freeze cooked fish (without fresh garnishes) for up to 3 months; thaw overnight in the fridge and reheat gently at 275°F until just warmed through to preserve texture.

Can I substitute ingredients in Pan-Seared Fish Yassa with Caramelized Onions and Lemon?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Pan-Seared Fish Yassa with Caramelized Onions and Lemon for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Pan-Seared Fish Yassa with Caramelized Onions and Lemon?

African seafood like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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