In reply to Skol:
Most non-animal fats are unsaturated so not a problem... as a general rule no more than a third of you fat intake should be saturated, but that's unlikely with a vegetarian diet.
The main thing is making sure that you're getting complimentary proteins. With a balanced diet including meat, you can reasonably assume you'll get enough of each of the essential amino acids, but a lot of vegetables are deficient in one or more. Legumes tend to be short on methionine and grains tend to be short of lysine, so mixing grains and beans is a good idea. Eggs are about the most complete protein source available so are a good idea unless and until she decides to become vegan.