This casserole is super easy ... Drain well. Combine noodles, tuna, soup, milk, peas, salt and pepper. Mix well. Transfer to baking dish. In a small dish combine melted butter and breadcrumbs.
Red miso works best for adding to marinades and stews rather than for the creamy casserole. For the tuna dish, it's best to stick with either white or yellow miso. If you're a little miso-shy ...