Preheat your oven to 350°F (175°C).
Cook the egg noodles according to package instructions; drain and set aside.
In a large bowl, combine the tuna, cream of mushroom soup, milk, and garlic powder.
Add the cooked noodles and frozen peas to the mixture. Stir well to combine.
Season with salt and pepper to taste.
Transfer the mixture to a greased baking dish.
Sprinkle shredded cheddar cheese evenly over the top.
Top with breadcrumbs for a crispy finish.
Bake in the preheated oven for 25-30 minutes, until bubbly and golden.
Remove from the oven and let it cool for a few minutes before serving.