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A golden-brown cheesy seafood gratin served in a rustic ceramic dish, topped with melted cheese and garnished with fresh herbs, with visible shrimp, scallops, and a creamy sauce peeking through the crispy crust

30-Minute Cheesy Seafood Gratin: Easy & Delicious!

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Discover the delectable 30-Minute Cheesy Seafood Gratin—a quick, easy, and irresistibly cheesy seafood dish perfect for weeknight dinners or special occasions. Featuring succulent seafood baked in a creamy cheese sauce with a crispy breadcrumb topping, this recipe guarantees restaurant-quality results in just half an hour.

  • Total Time: 30 minutes
  • Yield: 4 servings 1x

Ingredients

Scale
  • 1 lb (450g) mixed seafood (shrimp, scallops, crab meat)
  • 1 cup shredded Gruyère or cheddar cheese
  • 1/2 cup Parmesan cheese, grated
  • 1 cup heavy cream
  • 2 tablespoons unsalted butter
  • 3 cloves garlic, minced
  • 1 small onion, chopped
  • 1 cup breadcrumbs (preferably panko)
  • Fresh parsley, chopped (for garnish)
  • Salt and pepper to taste
  • 1 tablespoon olive oil

Instructions

  1. Start by cleaning and patting dry your seafood. In a skillet, heat a tablespoon of olive oil over medium heat. Add the chopped onion and minced garlic; sauté until fragrant. Toss in the seafood and cook for about 3-4 minutes until just opaque. Season with salt and pepper, then remove from heat.
  2. In a separate saucepan, melt the butter over medium heat. Pour in heavy cream and stir continuously until it starts to simmer. Gradually add the shredded cheese, stirring constantly until the mixture is smooth and cheesy. Adjust the seasoning with salt and pepper.
  3. Preheat your oven to 375°F (190°C). In a baking dish, combine the cooked seafood mixture with the cheesy sauce. Sprinkle breadcrumbs evenly over the top for a crispy crust. Finish with a generous sprinkle of Parmesan cheese and chopped parsley for color and freshness.
  4. Bake the gratin in the preheated oven for 15-20 minutes, until the top is golden brown and bubbly. Let it rest for a few minutes before serving to enhance flavors.

Notes

  • You can experiment with different types of cheeses like mozzarella, Monterey Jack, or pepper jack for varied flavors.
  • For gluten-free variation, replace breadcrumbs with crushed gluten-free crackers or omit them entirely.
  • This dish is best served immediately, but leftovers can be stored in an airtight container in the fridge for up to 2 days. Reheat in oven or microwave until heated through.
  • Author: Serena Miller
  • Prep Time: 10 minutes
  • Cook Time: 20 minutes
  • Category: Dinner
  • Method: Baking, Sautéing
  • Cuisine: Seafood
  • Diet: Gluten-Free optional

Nutrition

  • Serving Size: 1 portion
  • Calories: 480 kcal Kcal
  • Sugar: 3g
  • Sodium: 720mg
  • Fat: 30g
  • Saturated Fat: 15g
  • Unsaturated Fat: 12g
  • Trans Fat: 0g
  • Carbohydrates: 35g
  • Fiber: 2g
  • Protein: 28g
  • Cholesterol: 150mg