Preheat your oven to 350°F (175°C).
Cook the egg noodles according to package instructions until al dente. Drain and set aside.
In a large skillet over medium heat, combine the drained tuna, cream of mushroom soup, frozen peas, milk, garlic powder, onion powder, salt, and pepper. Stir until well combined and heated through.
Add the cooked egg noodles to the skillet and mix well to coat the noodles evenly with the cheesy tuna mixture.
Stir in 1 cup of shredded cheddar cheese, mixing until melted and well incorporated.
Transfer the mixture into a greased 2-quart baking dish. If desired, sprinkle crushed potato chips on top for added crunch.
Bake in the preheated oven for about 20 minutes or until the casserole is bubbly and slightly golden on top.
Remove from the oven and let it cool for a few minutes before serving. Top with the remaining ½ cup of shredded cheddar cheese if desired.