Also learn to make white sauce instead of using canned cream of mushroom soup.
Here’s a ham casserole: In a casserole dish, layer cooked noodles (any pasta though better if it’s not one of the long tangley ones, just cook it al dente), ham (cut into small cubes), frozen peas, chopped onion, white sauce, shredded cheese. Then repeat those layers. Top with breadcrumbs and paprika. Then bake at 350 for about 40 mins uncovered. It was a staple growing up on any night after having ham for dinner. These days I’ll make it without bothering having just ham the night before.