Mom made this all the time growing up. My step-sister recently e-mailed me asking for the recipe, thinking it had been from scratch! Of course, growing up our tastes weren't very refined and now i can tell that it's not from scratch. A few variations to the directions on the package and I still think it's delicious. My husband loves this recipe. I am not sure on the size of the egg noodles bag, but just cook up however many noodles your family needs.
This is a really, really simple meatloaf which uses ingredients I always have on hand. Mom told me the directions over the phone, so amounts are approximate. The relish is really to taste. I have made this way too sweet before, so I recommend starting out with maybe only one tablespoon of the sweet relish.