It's a good start, and she certainly seems to be doing pretty well with trying new things! I would also throw in some cooked yams. Very rich in vitamin A, which greys, in particular, need. If you can eventually find kale, chard or dandelion greens (even those growing in your lawn can be fed to her as long as you are certain nothing's been sprayed on them), and if she doesn't touch them, then finely cut some up and incorporate it into the yams.