Cajun seasoning, ripe tomatoes, onions and bell peppers add bold flavor and a gentle heat to any white fish. This skillet recipe is fast, simple and perfect for a busy weeknight when you want a healthy, satisfying meal without fuss.
Skillet Cajun Spiced Fish with Tomatoes
I used flounder in this version, but any firm, white, flaky fillet will work beautifully — think sole, cod, halibut or striped bass. In the summer, when fresh striped bass is available after a day of fishing, this is one of my go-to preparations. The tomato-based sauce cooks quickly on the stove and infuses the fish with bright, savory flavor. Serve with crusty bread, brown rice, or quinoa to soak up the sauce for a complete meal.
Why this recipe works
The combination of Cajun spices and fresh tomatoes gives the dish depth without overwhelming the natural delicacy of white fish. Onions and garlic soften into the sauce, while bell pepper adds texture and a subtle sweetness. Because the fish cooks gently in the sauce, it stays tender and moist — no risk of drying out from overcooking. The whole process takes about 25 minutes from start to finish.
Variations and Tips
- Choose any firm, boneless white fillet: flounder, fluke, tilapia, cod, halibut or striped bass are all excellent options. Buy local when possible and ask your fishmonger for the freshest catch.
- Buy fresh fish the day you plan to cook it, or the day before. If fresh isn’t available, keep frozen fillets on hand — they’re a great pantry staple.
- To thaw frozen fillets quickly, keep them sealed in their package or a Ziploc and submerge in an ice bath for about 30 minutes. Defrosting slowly overnight in the refrigerator is ideal when you have time.
- If you prefer other seafood, this sauce pairs well with scallops, shrimp or even firm tofu for a vegetarian option.
- Substitute canned diced tomatoes if fresh tomatoes aren’t in season. Drain slightly or use as-is for a slightly looser sauce.
- Adjust the Cajun seasoning to taste: use less for a milder dish or add a pinch of smoked paprika, cayenne, or chipotle for a deeper, smoky heat.
More fish recipe ideas
- Baked Salmon with Fresh Herbs
- Ahi Tuna Poke Bowl
- Skillet Fish Fillet with White Wine and Capers
- Healthy Baked Fish Sticks with Lemon
- Flounder Milanese with Arugula
Skillet Cajun Spiced Fish with Tomatoes
Yield: 4 servings
Serving size: 1 fillet with sauce
Prep: 5 mins Cook: 20 mins Total: 25 mins
Calories: 206 kcal | Protein: 33 g | Carbs: 10 g | Fat: 4 g | Fiber: 2 g
Ingredients
- 1 tsp olive oil
- 4 fillets, about 6 ounces each, white fish (flounder, fluke, tilapia, cod)
- 3/4 cup onion, chopped
- 2 cloves garlic, minced
- 3/4 cup diced green bell pepper
- 2 1/2 cups ripe tomatoes, chopped (or one 14.5 oz can diced tomatoes, drained)
- 1 tbsp Cajun spice seasoning (adjust to taste)
- Salt and freshly ground black pepper, to taste
Instructions
- Heat a deep skillet over medium heat and add the olive oil. Sauté the chopped onion and minced garlic for several minutes, until the onion is soft and translucent.
- Add the diced green bell pepper and chopped tomatoes to the skillet. Stir in the Cajun seasoning, salt and pepper. Cook, stirring occasionally, until the tomatoes begin to soften and release their juices, about 2–3 minutes.
- Nestle the fish fillets into the tomato mixture, spooning a little sauce over the top. Reduce heat to medium-low, cover the skillet, and cook until the fish flakes easily with a fork, about 12–15 minutes depending on thickness.
- Carefully transfer the fillets to plates and spoon the tomato-pepper sauce over them. Serve immediately with crusty bread, brown rice, quinoa or a green salad.
Notes
Canned diced tomatoes can be used in place of fresh tomatoes when needed; fresh tomatoes give a brighter flavor but canned works well year-round. Adjust seasoning and heat level to your preference.
Nutrition (per serving)
Serving: 1 fillet with sauce — Calories: 206 kcal, Carbohydrates: 10 g, Protein: 33 g, Fat: 4 g, Sodium: 341 mg, Fiber: 2 g, Sugar: 0.5 g.
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