A Hearty Baked Dish with Layers of Flavor

This Creamy Tuna and Potato Casserole is a comforting, one-dish meal that layers tender sliced potatoes, savory tuna, and a rich cheese sauce. With sautéed onions for sweetness and a golden, bubbly top—it’s perfect for weeknight dinners, potlucks, or whenever you need a warm, satisfying bite.

A nostalgic twist on classic comfort food!


Why You’ll Love This Recipe:

  • 🥔 Potato Perfection: Thinly sliced and baked to soft, buttery tenderness.
  • 🐟 Tuna Power: Flaked tuna adds protein and savory depth to every layer.
  • 🧀 Cheesy Goodness: Cheddar or mozzarella melts into a golden, creamy crown.
  • ⏱️ Quick Assembly: From prep to oven in under 15 minutes—ideal for busy cooks.
  • 🎉 Great for Sharing: Perfect at family dinners, school events, or holiday tables.

Ingredients (Serves 6–8):

For the Potatoes:

  • 6 medium potatoes , peeled and thinly sliced (about 4 cups – Yukon Gold or Russet work best)
  • 1 tsp salt (for boiling potatoes – optional)

For the Onion Layer:

  • 1 medium onion , sliced into half-rings (or shallot for milder flavor)

For the Creamy Sauce:

  • 2 tbsp unsalted butter (or oil for dairy-free)
  • 2 tbsp all-purpose flour (or cornstarch for gluten-free)
  • 1½ cups heavy cream or whole milk (or half-and-half for extra richness)
  • ½ cup chicken or vegetable broth (adds depth without heaviness)
  • Salt and black pepper , to taste

For the Filling & Topping:

  • 2 cans (5 oz each) drained tuna , flaked (or canned salmon for variation)
  • 1 cup shredded cheddar or mozzarella cheese (or vegan cheese for dairy-free)
  • Fresh parsley or chives , chopped (optional – for garnish)

Instructions:

Step 1: Boil the Potatoes

Bring a large pot of salted water to a boil.

Add thinly sliced potatoes and cook for 8–10 minutes until just tender but not mushy.

Drain and set aside while preparing the sauce.

Tip: Use a mandoline or sharp knife for even slices—ensures uniform cooking.


Step 2: Sauté the Onions

In a skillet over medium heat , melt 1 tbsp butter .

Add onion slices and cook for 5 minutes , stirring occasionally, until soft and slightly golden.

Set aside to cool slightly before mixing with tuna.


Step 3: Make the Creamy Sauce

In the same skillet, melt remaining butter over medium heat.

Whisk in flour and cook for 1–2 minutes to form a roux.

Gradually whisk in cream/milk + broth until smooth and thickened (about 3–4 minutes ).

Season with salt and pepper .


Step 4: Combine Filling

In a large bowl, mix:

  • Drained tuna
  • Sautéed onions
  • Creamy sauce

Stir until fully incorporated and slightly thickened.


Step 5: Assemble the Casserole

Grease a 9×13-inch baking dish with butter or oil.

Layer:

  • Half the potatoes
  • Half the tuna mixture

Repeat layers, finishing with a final layer of potatoes.


Step 6: Top & Bake

Sprinkle cheese evenly over the top.

Cover with aluminum foil and bake at 375°F (190°C) for 25–30 minutes , or until bubbly.

Remove foil and bake 10–15 minutes longer , until golden and crisp.


Step 7: Garnish & Serve Warm

Let cool for 5–10 minutes before slicing.

Top with fresh parsley and serve warm with:

  • Green beans
  • Coleslaw
  • Crusty bread

Each bite brings together:

  • Buttery, tender potato layers
  • Silky, seasoned cheese sauce
  • Savory, flaky tuna pockets
  • And that classic golden crust charm

Tips for Success:

  • 🥣 Roux Hack: Whisk constantly when adding liquid to avoid lumps.
  • 🧈 Use Cold Hands: Helps layer ingredients without sticking.
  • 🧁 Cheese Swap Magic: Try Gouda, Monterey Jack, or Parmesan for different finishes.
  • 🥦 Add Veggies: Stir in peas, carrots, or spinach for extra nutrition.
  • ❄️ Make Ahead Magic: Assemble and refrigerate overnight—bake fresh when ready.

Serving Suggestions:

  • Pair with steamed greens, roasted squash, or a crisp green salad .
  • Great with beer, lemon water, or a cold glass of milk.
  • Ideal for leftovers, school lunches, or casual dinners .

Nutritional Information (per serving, makes 8 – approximate):

(With regular cream and cheddar – per slice)

  • Calories: ~300 kcal
  • Protein: ~12g
  • Carbohydrates: ~25g
  • Fat: ~18g
  • Fiber: ~1g
  • Sugar: ~4g

This Creamy Tuna and Potato Casserole proves that simple ingredients can create something unforgettable. With its tender potatoes, savory tuna, and rich cheese sauce—it’s a must-bake for lovers of hearty, comforting dishes.

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