Each parrot is different and will need you to figure out what he liekes best, and what is good for him. And each parrot owner is different too. All I can tell you for sure is what I do for my Salty.
He has Roudyboush pellets available 24 hrs a day. When his water bowl was closer to the food bowl, he used to dip the pellets in water , return them to the food bowl and eat. Since we moved them apart, he doesn't do that any more. Pellets changed 1x a day , fresh water 2x a day.
He gets lunch around 1:00pm - 2 or more kinds of fruits that we know he will eat. Those are removed around 5 PM.
Dinner is at 7-7:30, with the family ( very important to building the 'flock' feeling in parrots, in my opinion). Dinner is either chop of various kinds, mixed with Avi-cakes, or pellets or groats OR cooked sweet potato or pumpkin or squash. THat is left until bed time at 10. When we make chop, it's a lot of it ( last batch was 38 baggies of it) and we defrost some before dinner. Sometimes zap it to 'cook' the contents but usualy not. He likes a hot peppers based chop, I mean the hottest, plus all the good veggies thrown in. Chop Day is like every 1-1/2 months like this.
I hope this helps. Every parrot is different, some like big chuncks some like smaller, some will want chop very finely chopped.
Salty gets some pine nuts chopped into small pieces as training treats, after dinner, and sometimes during the day if he is being a good boy.
Use the search feature , you will get pages and pages of results on diet, chop and feeding of parrots.