I had a bunch of lasagna noodles left over from making Italian Veggie Pie. And I didn't want anything else with tomato sauce. So I did a search for a "use what you have" recipe. Allrecipes.com came through for me with this one. I did change it a little. This could serve as a side or light dinner. I like that it's 6 ingredients and quick and easy to make. (And my kids like that it's carb-overload)
Lasagna noodles, 6-9 cooked according to package directions
1 onion, sliced
3 T butter
2 cups dry potato flakes
1 8oz block cream cheese
1 cup sharp cheddar cheese, shredded
Saute onion in butter for 2 minutes or until translucent. Cook potato flakes according to package direction *except omit the milk. Add the cream cheese instead. In sprayed casserole dish, layer noodles and potato mixture ending with noodles. Here's where I changed it: to keep noodles from dying out, I sprinkled lightly with sharp cheddar cheese. Top with sauted onions. Heat at 350 for 20 minutes or until bubbly.
Another idea would be to sprinkle with bacon bits (real ones, not from a jar). And you could always use leftover real mashed potatoes which would probably be even better. Also, some people suggested serving it with a hot cabbage cole slaw, which sounded great to this German girl! But I know most people don't like cabbage. (If you are interested in this look up "fried cabbage" and you'll get several recipes).