Most of my birds like vegetables, when they are slightly cooked and warm. Prepared that way they eat more then when I just give them the raw veggies. Here is one of my easy and fast to prepare parrot food recipes:
For my 11 parrots I take two large carrots, a medium sized head of broccoli, half of small head of fennel and a stalk of celery. Sometimes I use zucchini, peppers, beets or other vegetables. I cook them in the steam over boiling water until they are still a little crispy. Then I cut the vegetables in different sized cubes, ad 1 teaspoon of olive oil, mix it, ad 2 teaspoons of sesame seeds and 2 table spoons of rolled oat and mix it again.
And voila, ready is the yummy dish