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1. Cook the Onion:
Heat the Oil:
Heat a pan over medium-high heat with a little olive oil.
Cook the Onion:
Add the sliced 1/2 onion and cook for 8-10 minutes, stirring occasionally until softened and golden.
2. Cook the Potatoes:
Boil the Potatoes:
In a large pot, add 5 potatoes, cover with water, and season with salt.
Cook for 15-20 minutes or until the potatoes are tender.
Drain:
Once the potatoes are soft, drain the water, reserving 1/2 cup of the potato water if using tomato paste.
3. Prepare the Tuna Mixture:
Add Tomato Paste or Sauce:
If using 2 tablespoons of tomato paste, mix in 1/2 cup potato water. If using 4 tablespoons of tomato sauce, skip the water.
Add the tomato mixture to the cooked onions and stir for 2-3 minutes.
Add Tuna:
Stir in 2 cans of drained tuna and cook for another minute. Remove from heat and set aside.
4. Make the Mashed Potatoes:
Mash the Potatoes:
Add 1 tablespoon butter, 175 ml milk, salt, and black pepper to the drained potatoes.
Use a potato masher to mash until smooth and creamy.
5. Assemble the Casserole:
Layer the Potatoes and Tuna:
In a baking dish, spread a layer of mashed potatoes on the bottom.
Add a layer of the tuna mixture on top.
Follow with another layer of mashed potatoes, and then a final layer of tuna.
6. Bake:
Add Cheese:
Sprinkle 100 grams of grated cheese on top of the casserole.
Bake:
Preheat the oven to 190°C (375°F) and bake for about 5 minutes or until the cheese is melted and bubbly.
7. Serve:
Once the cheese is melted and golden, remove from the oven and serve hot. Enjoy!
Serving Suggestions:
Serve this casserole with a fresh green salad or steamed vegetables for a complete meal.
Cooking Tips:
You can add herbs like parsley or thyme to the mashed potatoes for extra flavor.
For a crispier top, you can broil the casserole for the last minute or two.
Nutritional Benefits:
Tuna is a great source of protein and omega-3 fatty acids.
Potatoes provide fiber, vitamins, and minerals.
Dietary Information:
Gluten-free: This recipe is naturally gluten-free.
Nutritional Facts (per serving):
Calories: 350
Protein: 18g
Carbohydrates: 40g
Fat: 12g
Storage:
Fridge: Store leftovers in an airtight container in the fridge for up to 3 days.
Freezer: You can freeze the casserole for up to 1 month. Reheat in the oven before serving.
Why You’ll Love This Recipe:
Comforting and Hearty: Layers of creamy potatoes and savory tuna make this a warm and comforting dish.
Quick and Easy: Simple ingredients and easy steps make this an ideal weeknight dinner.
Customizable: You can add veggies like peas or corn for extra nutrition and flavor.
Conclusion:
This Tuna and Mashed Potato Casserole is a classic and comforting meal that combines the creamy texture of mashed potatoes with the savory taste of tuna and cheese. It’s easy to prepare and makes for a satisfying dinner that the whole family will love.
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