My parrots really like oven baked bites, tgey sell st Pet Smart .
The more the parrot tries new stuff the better tgey will be at trying new stuff. Its making their thinking more fluid.
They way that works for me, and has worked in 2 budgies, 4 quakers, and 2 GGC all of diverse backgrounds. So I'm starting to think its a good system!
First I don't limit their seeds. ( after they are eating everything, months of eating veg, then I do offer seeds only in the afternoon )
I start out feeding seeds by hand , off and on throughout the day. ( even tho seeds are in their dish ) when they always come running to me for the seed, I start to offer new things by hand. At first I choose stuff that most parrots like. Like a tiny crumb size piece if Apple. Then i put the slice in a shallow dish , and let them find it. Oh and I still offer a seed here and there to during all this. Next I might offer a kernel of fresh corn, then put some out. Then maybe a grape. Or a piece of banana, or a pea.. now they are conditioned to come and see what I offer, and are predisposed to think it will be yummy. I start to offer every new veggies this way, and then out it in the dish. They may not eat each new thing from my hand at first, but they all come and check it out and usually will at least beak touch it. O aldo find spreading out parrot foot size chunks in a slow dish on top of the cage helps, tgey can explore it when they want. I never stop giving things by hand a few times a day, it could be a pellet, or. a seed or tiny piece of veggies.
Pretty soon they love to explore and eat all the vegetables i put out.
But you can also puree some cooked vegetables, or just small cut up pieces of cooked add to rice and offer like its human food still warm, or with a little pasta.
I also have little dishes of pellets set out. Once they are do good at trying new things, they seem equally happy to try new pellets, or just gett a hankering for them I guess.
Hope it helps you