Prepare the Pasta

• Begin by preheating your oven to 350°F (175°C). Grease a 9×13-inch baking dish with a bit of butter or non-stick cooking spray.
• Bring a large pot of salted water to a boil. Add the egg noodles (or pasta of your choice) and cook according to package instructions, usually about 7-8 minutes, until the pasta is al dente.
• Drain the pasta and set it aside.

Prepare the Creamy Sauce

• While the pasta is cooking, prepare the creamy sauce. In a large saucepan, melt the butter over medium heat. Add the minced garlic and cook for 1-2 minutes, stirring frequently, until the garlic becomes fragrant and soft.
• Sprinkle the flour over the butter and garlic, stirring continuously to make a roux. Cook for 1-2 minutes to remove the raw flour taste, but do not let it brown.
• Gradually add the milk and chicken broth, whisking constantly to ensure the mixture stays smooth. Bring the sauce to a simmer and cook for about 5-7 minutes, allowing it to thicken.
• Stir in the Dijon mustard, salt, pepper, paprika, and onion powder. Taste the sauce and adjust the seasoning as needed.

Assemble the Casserole

• In a large mixing bowl, combine the cooked pasta, flaked tuna, frozen peas, and shredded cheddar cheese. Pour the creamy sauce over the mixture and stir gently to combine, making sure everything is evenly coated.
• Transfer the tuna noodle mixture into the prepared baking dish and spread it out evenly.

Add the Topping

• In a small bowl, combine the panko breadcrumbs with a tablespoon of melted butter. Stir to coat the breadcrumbs evenly. Sprinkle the breadcrumbs evenly over the top of the casserole.
• Bake the casserole in the preheated oven for 30-35 minutes, or until the sauce is bubbly and the top is golden brown and crispy.

Serve and Enjoy

• Once the casserole is finished baking, remove it from the oven and let it rest for 5 minutes before serving. Garnish with freshly chopped parsley for a touch of color and flavor.
• Serve the casserole hot, and enjoy with your favorite side dishes. This dish is perfect on its own or with a simple green salad or roasted vegetables on the side.