Step 1: Prepare the Onion
Heat a small amount of oil in a large pan over medium heat.
Cut the onion into half rings and add it to the pan.
Fry the onion until softened and golden brown, about 5-7 minutes. Stir occasionally to prevent burning and ensure even cooking.
Step 2: Cook the Potatoes
Peel and cut the potatoes into cubes.
Place the potatoes in a pot and cover them with cold water.
Add 1 tsp salt to the water, and bring it to a boil over medium-high heat.
Once the water is boiling, reduce the heat to low and simmer the potatoes for about 15-20 minutes, or until they are tender when pierced with a fork.
Once done, drain the potatoes, reserving about 1 ladle of the potato broth for later use.
Step 3: Prepare the Tuna Mixture
Drain the brine from the canned tuna and add the tuna to the pan with the cooked onions.
Add 2 tbsp tomato paste and 1 ladle of the reserved potato broth to the pan. Stir everything together and cook for about 2-3 minutes on low heat to allow the flavors to meld together.
Season with salt and black pepper to taste, adjusting the seasoning as needed.
Step 4: Mash the Potatoes
After the potatoes are drained, add the butter to the pot with the potatoes while they are still hot.
Mash the potatoes with a potato masher until smooth and creamy.
Gradually add the 180 ml hot milk and continue to mash and mix until the potatoes are smooth and fluffy.
Season with salt and black pepper to taste.
Step 5: Assemble the Casserole
Preheat your oven to 190°C (375°F).
In a greased baking dish, spread a layer of the mashed potatoes on the bottom.
Add a layer of the tuna and onion mixture over the potatoes.
Add another layer of mashed potatoes on top of the tuna mixture.
Add a final layer of the tuna and onion mixture.
Sprinkle grated mozzarella evenly on top of the casserole to create a cheesy, golden crust.
Step 6: Bake the Casserole
Place the assembled casserole in the preheated oven and bake for 10-15 minutes, or until the mozzarella is melted and golden brown on top.
Once baked, remove from the oven and let the casserole cool slightly before serving.
Serving Suggestions
Serve this Tuna and Potato Casserole alongside a green salad with a light vinaigrette for a balanced meal.
Pair it with roasted vegetables, such as carrots, broccoli, or green beans, for added nutrition and flavor.
For a more indulgent meal, serve the casserole with a side of garlic bread or crusty rolls.
Nutritional Information (Approximate per Serving)
Calories: 350-400
Carbohydrates: 40g
Fiber: 5g
Sugar: 5g
Protein: 20g
Fat: 18g
Sodium: 700mg
This casserole provides a healthy balance of protein from the tuna, fiber from the potatoes, and calcium from the mozzarella. It’s a filling meal that satisfies your hunger and provides essential nutrients.
Origins and Popularity of the Recipe
The tuna casserole has been a staple in many households, particularly in North America, since the mid-20th century. The combination of tuna and potatoes is simple, affordable, and comforting. Over time, various versions of the dish have emerged, with many adding cheese or other ingredients like peas or mushrooms to enhance flavor.
This version with mozzarella cheese and a simple tomato paste tuna mixture gives the dish a Mediterranean twist, which is common in many European countries where canned tuna is widely used.
Reasons Why You’ll Love This Recipe
Simple Ingredients: This dish uses basic pantry staples, making it easy to prepare even on busy days.
Comforting: The combination of creamy mashed potatoes and savory tuna makes this a comforting meal everyone will enjoy.
One-Pan Wonder: This recipe comes together in one baking dish, making it easy to assemble and clean up afterward.
Quick to Make: With a prep time of only 20 minutes, this casserole is quick and easy, perfect for a weeknight dinner.
Health Benefits
Tuna: A great source of omega-3 fatty acids, which support heart health and reduce inflammation. It also provides protein and vitamin D.
Potatoes: Rich in potassium, fiber, and vitamin C, potatoes help promote heart health, improve digestion, and support immune function.
Mozzarella: A good source of calcium and protein, which supports healthy bones and muscles.
Onions: Contain antioxidants and compounds that may help reduce the risk of heart disease and support healthy digestion.
Cooking Tips
Don’t Overcook the Potatoes: When boiling the potatoes, be careful not to overcook them. You want them tender, but not falling apart.
Customize the Casserole: You can add other vegetables, such as peas, carrots, or spinach, to make the casserole more nutritious and colorful.
Cheese Options: If you prefer a different cheese, try substituting the mozzarella with cheddar, parmesan, or a combination of cheeses for a different flavor profile.
Make It Ahead: This casserole can be assembled in advance and stored in the fridge for up to 2 days. Simply bake it when you’re ready to serve.
Variations to Try
Vegetarian Version: Replace the tuna with chickpeas or lentils for a hearty vegetarian version of this casserole.
Extra Veggies: Add some mushrooms, zucchini, or bell peppers to the tuna mixture for added texture and flavor.
Spicy Version: Add some chili flakes or jalapenos to the tuna mixture for a little heat.
Conclusion
This Tuna and Potato Casserole with Mozzarella is a delicious, easy-to-make comfort food that combines hearty mashed potatoes, savory tuna, and gooey mozzarella cheese. It’s the perfect meal for a cozy family dinner and can be customized to suit your tastes. Whether you serve it on a weeknight or at a weekend gathering, this casserole will be a hit with everyone at the table.
Frequently Asked Questions (FAQs)
Can I make this casserole ahead of time?
Yes, you can prepare it up to 2 days in advance and store it in the fridge. Just bake it when ready to serve.
Can I use fresh tuna instead of canned?
Yes, fresh grilled or poached tuna can be used in place of canned tuna. Just ensure it’s cooked before adding it to the mixture.
Can I make this casserole gluten-free?
Yes, you can substitute the regular flour with gluten-free flour or cornstarch to make it gluten-free.
Can I freeze this casserole?
Yes, you can freeze the casserole for up to 2 months. Make sure it’s tightly wrapped before freezing. Reheat it in the oven when ready to serve.
Can I add more cheese to this casserole?
Absolutely! If you love cheese, feel free to double the mozzarella or add cheddar for a cheesier casserole.
How do I store leftovers?
Leftover casserole can be stored in an airtight container in the fridge for up to 3 days.
Can I add more vegetables to the casserole?
Yes, you can add peas, carrots, or spinach to the tuna mixture for added nutrition and flavor.
What can I serve with this casserole?
Serve with a side of green salad or garlic bread for a well-rounded meal.
Can I use a different type of cheese?
Yes, feel free to use parmesan, cheddar, or any other cheese you prefer.
How can I make the casserole spicier?
Add chili flakes, jalapenos, or hot sauce to the tuna mixture for a spicy kick.
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