In a large mixing bowl, combine the diced ham, cooked pasta, shredded cheddar cheese, milk, cream of mushroom soup, frozen peas, salt, and black pepper.
Pour the mixture into a greased baking dish.
Bake in the preheated oven for 45 minutes, or until the casserole is bubbly and golden brown on top.
Let it cool for a few minutes before serving. Enjoy!
Notes:
This casserole is a great way to use up leftover ham from Easter dinner.