Tuna and pea casserole bakes canned tuna and sweet peas in a creamy sauce over noodles for a quick, protein-rich family dinner. This budget-friendly, retro comfort food is a weeknight pantry staple.
Preheat oven to 375°F and lightly grease a 9x13-inch baking dish for even cooking.
Boil the egg noodles in salted water for about 6 minutes, stirring occasionally; drain and set aside (noodles will finish cooking in the oven).
In a large bowl, combine drained tuna, frozen peas (no need to thaw), cream of mushroom soup, milk, onion powder, black pepper, and salt. Mix well, then gently fold in half the shredded cheddar cheese.
Add cooked noodles to the mixture, tossing carefully to coat; transfer evenly into the prepared baking dish.
Top with the remaining cheddar cheese and sprinkle panko breadcrumbs on top. Bake for 25–30 minutes, uncovered, until golden and bubbly; cool 5 minutes before serving for easier slicing.