Tuna casserole is a tremendously frugal meal — you can feed up to four people for less than $10! But frugal doesn’t have to mean boring and bland, and this recipe has great flavour.
You can substitute the tuna for another fish, if you prefer. I like bulking this up with cooked pasta (and occasionally use brown rice) and then serving it with a salad. It makes for a cheap and healthy family meal.