Step 1: Prepare the Potatoes
- Boil the Potatoes: Place the peeled and diced potatoes in a large pot of salted water. Bring to a boil over high heat, then reduce to a simmer and cook for about 10-15 minutes, or until the potatoes are tender when pierced with a fork.
- Mash the Potatoes: Drain the potatoes and return them to the pot. Add the butter, milk, salt, pepper, and garlic powder (if using). Mash until smooth and creamy. Stir in the Parmesan cheese if you’re using it, for an added layer of flavor.
Step 2: Prepare the Tuna Mixture
- Sauté the Onions: In a skillet, heat the olive oil over medium heat. Add the chopped onion and sauté for about 3-5 minutes, until softened and slightly golden.
- Combine Tuna and Peas: Add the tuna (drained) and peas (if using) to the skillet with the onions. Stir until combined and heated through. If you like, you can add some garlic powder or a dash of paprika for extra flavor.
- Make the Sauce: In a bowl, mix the mayonnaise and Dijon mustard (if using). Add this sauce to the tuna mixture, stirring to combine. Season with salt and pepper to taste.
Step 3: Assemble the Bake
- Layer the Dish: Preheat your oven to 375°F (190°C). Grease a baking dish (9×13-inch works well). Spread a layer of the mashed potatoes on the bottom of the dish.
- Add the Tuna Mixture: Spoon the tuna and onion mixture evenly over the mashed potatoes.
- Top with Cheese: Sprinkle the shredded cheddar cheese evenly over the tuna mixture.
Step 4: Add the Crunchy Topping (Optional)
- Breadcrumb Topping: In a small bowl, combine the breadcrumbs with the melted butter. Sprinkle the breadcrumbs over the top of the casserole for a crispy, golden crust.
Step 5: Bake
- Place the dish in the preheated oven and bake for 20-25 minutes, or until the cheese is melted and bubbly, and the top is golden brown.
- If you’re using breadcrumbs, you can broil the dish for an additional 2-3 minutes to get the breadcrumbs extra crispy.
Step 6: Serve and Enjoy
- Garnish with fresh parsley if desired for a pop of color and freshness.
- Serve hot, with a side salad or steamed vegetables for a complete meal.
Tips for Success
- Customize with Veggies: Feel free to add other vegetables to the tuna mixture, such as corn, carrots, or broccoli, for extra flavor and nutrition.
- Use Fresh Potatoes: For a fluffier mashed potato base, opt for Yukon Gold or Russet potatoes.
- Make it Gluten-Free: Skip the breadcrumbs or use gluten-free breadcrumbs if you prefer a gluten-free version of this recipe.
- Make Ahead: This dish can be assembled ahead of time and stored in the fridge for up to 24 hours before baking. Simply cover it tightly and refrigerate, then bake when you’re ready to eat.
Serving Suggestions
- Side Salad: Pair the tuna and potato bake with a simple green salad or a tangy coleslaw for a balanced meal.
- Bread: Serve with a side of crusty bread to soak up any creamy sauce left in the dish.
Conclusion
This Tuna and Potato Bake is a simple yet delicious dish that combines hearty mashed potatoes with tender tuna and a savory cheese topping. It’s perfect for a family meal, a weeknight dinner, or even for meal prepping. You can make it your own by adding extra veggies, adjusting the seasoning, or even experimenting with different cheeses. Whatever you choose, this dish will bring comfort and warmth to your table!