Coat a large nonstick skillet with cooking spray, and place over medium heat until hot. Add mushrooms and next 3 ingredients; sauté for 6 minutes or until tender.
Combine milk and next 6 ingredients in a bowl; stir well. Add mushroom mixture, noodles, and next 3 ingredients; stir gently.
Spoon noodle mixture into a shallow 2-quart casserole coated with cooking spray. Cover and bake at 350° for 40 minutes.
Combine the breadcrumbs, Parmesan cheese, and margarine in a small bowl; stir well, and sprinkle over casserole. Bake, uncovered, at 350° for 10 minutes.
Make-Ahead Tips: You can assemble the casserole up to 4 hours ahead of time, omitting breadcrumb mixture; cover and chill. Let stand at room temperature 30 minutes before baking. Top with breadcrumb mixture during last 10 minutes of baking.
Great recipe. Very simple and very tasty. I've been making it for several years now and love it. Have tried variations using broccoli instead of peas and much more mushrooms. Just tonight I added some dijon mustard to the milk mixture and that added a delicious little zip. I'm going to do that from now on.
My husband made his version of tuna noodle casserole when we were first engaged 19 years ago. I had never had it before and wanted to love it, but couldn't help thinking why anyone would want to eat warm, canned tuna. When I found this recipe in Cooking Light I thought I would surprise him with this newer and lighter version, and even he had to admit it was a better recipe than his. I'm still not a huge fan, but I make it once or twice a year just to keep my man happy!
I've been making the classic tuna casserole -- tuna, noodles, peas, cream of mushroom soup, etc. -- for years. But this is now going to be my go-to version. This was really yummy. I'm looking forward to trying some variations -- thinking of adding some spinach, which I love, and/or some other veggies. I used elbow macaroni instead of noodles. Don't think it matters what form of pasta you use as long. I also substituted panko for breadcrumbs, which I'm doing a lot lately.