Tuna Potato Casserole

Prep: 20 min Cook: 45 min Serves: 6 Cuisine: American

A comforting casserole combining tender potatoes, flaky tuna, and a cheesy custard. Crispy bread crumbs add a delightful texture on top. Perfect for a hearty family dinner or a satisfying meal for seafood lovers seeking a creamy, savory dish with simple ingredients and classic flavors.

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Ingredients

  • 8 medium potatoes, peeled and boiled
  • Salt and pepper
  • 2 (6 oz.) cans flaked tuna, drained
  • 2 eggs
  • 2 cups milk
  • 2 Tbsp. grated Parmesan cheese
  • 1 Tbsp. seasoned fine dry bread crumbs

Instructions

  1. Preheat oven to 350°F (175°C).
  2. Cut the boiled potatoes into 1/4-inch slices.
  3. Arrange half of the potato slices in a greased shallow 2-quart baking dish.
  4. Sprinkle lightly with salt and pepper.
  5. Layer the drained tuna over the potatoes.
  6. Add the remaining potato slices on top.
  7. Beat the eggs, milk, and grated Parmesan cheese together until well combined.
  8. Pour the egg mixture over the layered potatoes and tuna.
  9. Sprinkle the seasoned bread crumbs evenly over the top.
  10. Bake for 45 minutes or until the custard is set and potatoes are golden brown.

Tips & Substitutions

For added flavor, consider mixing in some chopped onions or bell peppers with the tuna. If you're short on time, using pre-cooked or frozen potatoes can simplify the preparation. You can substitute the tuna with canned salmon for a twist, or use a mixture of seafood for a more complex flavor profile. Serve with a side salad for a complete meal.

Serving Suggestions

This casserole pairs beautifully with Seaside Salad for a fresh contrast. It can be served as a hearty main dish on its own or accompanied by steamed vegetables. Consider pairing it with crusty bread or a light soup for a complete meal. For a more substantial dinner, serve with mashed peas or a refreshing chow mein salad.

Storage & Reheating

Store any leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, place portions in a microwave-safe dish and cover to retain moisture, heating in short intervals until warmed through. Alternatively, reheat in the oven at 350°F (175°C) until heated, ensuring the top remains crispy.

Nutrition & Diet Analysis (per serving)

Each serving of Tuna Potato Casserole contains roughly 1270 calories, with 23g protein, 203g carbohydrates, and 41g fat. It is an excellent source of potassium (62% of the Daily Value), vitamin C (52% of the Daily Value), and protein (47% of the Daily Value). Note that it is relatively high in sodium, at 1548mg per serving (67% of the Daily Value).

1270 kcal 63% DV
Protein Fat Carbs

Macronutrients

Protein 23.4g 47% DV
Total Fat 40.9g 52% DV
Carbs 202.6g 74% DV
Fiber 8.7g 31% DV
Sugar 37.5g 75% DV

Electrolytes

Sodium 1547.8mg 67% DV
Potassium 2906.2mg 62% DV
Cholesterol 153.4mg 51% DV

Vitamins & Minerals

Vitamin A 190.3mcg 21% DV
Vitamin C 46.8mg 52% DV
Vitamin D 1.4mcg 7% DV
Calcium 575.2mg 44% DV
Iron 8.5mg 47% DV
Diet fit High-protein High-fiber Low-fat
Contains Milk Egg Wheat/Gluten Fish

Estimated from ingredients & per-serving nutrition — verify against package labels for allergies or strict diets.

* % Daily Values based on a 2,000 calorie diet (FDA 2020).

Frequently Asked Questions

Can I use fresh fish instead of canned tuna?

Yes, you can use fresh fish, but make sure to cook it first and flake it into pieces before layering it in the casserole. Adjust the baking time if necessary, as fresh fish may require less cooking time than canned tuna.

How can I make this dish gluten-free?

To make this casserole gluten-free, simply replace the seasoned bread crumbs with gluten-free alternatives, such as crushed gluten-free crackers or panko. Always check that your canned tuna and other ingredients are certified gluten-free to avoid cross-contamination.

Can I freeze this casserole?

Yes, you can freeze the casserole before baking. Assemble it in a freezer-safe dish, cover tightly, and freeze for up to 2 months. When ready to bake, thaw it in the refrigerator overnight and then bake as directed, adding a few extra minutes if needed to ensure it's heated through.

Nutrition is estimated from USDA FoodData Central ingredient data and may vary with brand, portion and preparation — see our methodology. This information is for general educational purposes only and is not medical or dietary advice (disclaimer).

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