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 cream of mushroom soup, milk, and garlic powder.
Add the drained tuna, cooked noodles, frozen peas, and half of the cheddar cheese to the bowl.
Mix all the ingredients until well combined.
Transfer the mixture to a greased 9x13-inch baking dish.
Spread the remaining cheddar cheese over the top.
Sprinkle breadcrumbs evenly over the cheese layer.
Drizzle olive oil over the breadcrumbs for added crunch.
Bake in the preheated oven for 25-30 minutes, or until bubbly and golden brown.