Actually I think it's a federal law in the United States that you're supposed to serve mashed potatoes with meat loaf. However, since I'm a bit adventuresome, I tend to break the law from time to time.
I, occasionally, serve buttered poppy seed noodles with meat loaf. Just cook up your favorite noodles, we use curly noodles, drain, then add some butter to coat. Toss in some salt and a good bunch of poppy seeds. Toss to coat well and serve. Yummy.
"As a girl I had zero interest in the stove." - Julia Child
This is real inspiration. Look what Julia became!