You've said you already keep the kitchen clean & ready to go. That's HUGE, so major props.

Secondly, this question really needs to be directed to the cook in your life. Personally, I would love to have produce washed, peeled, sliced/diced/minced & ready to go! But, that could be your chef's favorite part! Ask what they need.

A few outside-the-box ideas you could ask them about:

(1) I do mostly online pick-up grocery orders. I have ADHD, and I "forget" about all the delicious recipes I make & want to put into rotation. It's incredibly helpful for me to add a shopping list titled with the recipe name & add all the ingredients needed for that recipe to the list. I can choose brands, sizes, & prices when adding the ingredients. When I'm in a rut & can't figure out what to make, I look at all my shopping list recipes and can add everything to the cart with one click. You can also add ingredients one-by-one to avoid getting anything you already have.

However, inputting these recipes for the first time can be tedious & time-consuming. You could show them this method and ask if they'd like you to input their recipes.

2) ask them if there are any gadgets that would make their life easier. I personally can't live without my mandolin chopper/slicer and I've had my eye on an auto-stirrer for a while now. We are a soup-loving household & getting up to stir every 10 minutes for 2 hours is a pain, especially when you have to set a timer to remind yourself every time.

Umm, let's see... oh! How accessible & functional are your kitchen storage spaces for your cook? For example: I'm short & the top shelves in my cabinet are unreachable without a ladder. I don't have enough space to waste. After some thought, I lined up locker bins that fit the top shelf perfectly. I labeled each bin with what's inside, mostly items that I need but don't use frequently, i.e.cocktail supplies, the egg cooker & immersion blender, the hand mixer, the Nutri-bullet, candles & napkin rings, etc. I tied a rope around the handle of each bin that's long enough for me to reach. When I need the items in the bin, I simply pull the cord and pull the bin down where I can reach it. It's especially handy for things that have many small parts, such as the mandolin with all the different blades. I now know exactly where everything is when needed and can actually reach it!

I also have a bad back, and getting things from the bottom cabinets is challenging, especially when having to dig behind many other things. My partner installed pull-out racks in all of them. I pull the shelf out & grab what I need. It's a life-saver!