We had this at a friends house last night for dinner. It is super and easy and cheap. (Both of my favorites.) I know it might sound a little weird, but it was good.
ground beef (cooked with Taco seasoning)
whatever other veggies you want to put on it
chips (crumbled on top)
You just put everything on top of the noodles and mix together. Everyone can do their own so they only have the things they want on it. Lucas loved it... he ate two helpings. :)