Preheat your oven to 350°F (175°C).
Cook pasta according to package instructions; drain and set aside.
In a large mixing bowl, combine the cream of mushroom soup and milk.
Add the drained tuna, frozen peas, garlic powder, and onion powder to the mixture.
Season with salt and pepper to taste.
Fold in the cooked pasta until well combined.
Transfer the mixture to a greased casserole dish.
Sprinkle shredded cheese evenly over the top.
If desired, add breadcrumbs for extra crunch.
Bake in the preheated oven for 25-30 minutes, or until bubbly and golden on top.