You can also use any left over stir fry on its own if you want. Just make sure to put only the dry part of the stir fry.
Get the spring roll wrapper. You can find them in chinese groceries, but many supermarkets now have this in their frozen section.
Defrost them according to packet instruction. Once they are defrosted, lay flat one wrapper and fill in with the noodle, a piece of meat and vegetables.
Warp them in the shape of a spring roll and seal the edges with water.
Deep fry the spring roll until golden and enjoy with your favorite sauce
PS : you can also bake the spring roll in the oven, just spray them with some oil first. But I find that the end result is not as crispy as it would compared to when you deep fry them.