Salmon Cakes are one of our favorite budget meals. Canned Salmon is a bargin. 2 small cans will be plenty for you and your child.
This is our favorite recipe.
http://www.treehugger.com/green-food/barton-seavers-pink-salmon-cakes-with-dill-and-mustard.html
We broil them instead of frying. If you have one left over it's a perfect breakfast, with an over-easy egg, or lunch over greens.