Was thinking that maybe you and she could go on a cookery course together in the evenings, finances permitting, also evedawns idea is a really good one - a great way to get tried and tested homecooked recipes.
I have dozens of cookery books but the one I refer to most is Delia Smiths complete cookery course. I am not a fan of hers but the book covers everything, not just recipies, but cuts of meat, what cut is best for what, pulses, veg, breads, cakes, etc, the list is endless, its more like an encyclopedia of food with recipies thrown in. Don't think you could go far wrong with it.