Pretty bird species specific is a pellet, it will look completely different from the seed/nut mix you have been feeding Noah.With pellets it is advised that they are available at all times as you are doing The pellets are fine alongside the veggies.Try & vary his diet at times,perhaps offer him a little,pasta,rice etc mixed in with his veggies.Does Noah eat fruit ?
I have included two links for you,the first on what are members feed their greys & the second on introducing new foods...
http://www.greyforums.net/forums/bird-food/24030-whats-your-greys-diet.html
http://www.greyforums.net/forums/bird-food/53831-tips-for-getting-your-grey-to-eattry-new-foods.html