i stay away from grain... the carbs in hydrolyzed protein isolate is all your body needs to help with muscle rebuilding.
ofc you could mix spinach into it.. or eat a spinach turkey lettuce wrap...
but grains are usually a treat, so are beans... cause beans are lectins which are bound and carried by sugar.
this is my usual diet (yes im forgetting a few but im really tired and need a shower so i am in a hurry)
Veggies: broccoli, carrots, spinach, onions, radish, and avocado.
Fruits: all bell peppers, all chile peppers, tomatoes, a banana, coconut and all berries... (try to stay low sugar with the fruits)
proteins: any meat (soy and lectins are off limits)
fats: tree nuts.. like almonds, hazelnut or macadamia... (peanuts are actually a bean so they are counted out)
i usually throw together combos of above foods a week in advance.
my post workout is usually a chicken breast with spinach or broccoli, washed down by a hydrolyzed protein isolate mixed in water.
you have a window of less than an hour after a hard workout where your body wants intake, so you can get away without using protein shakes but its just easier that way.
hope this helps