[Ellie May]

Yes, you can definately provide better food than prescription diets.
If you want to do it long-term, I recommend talking to a nutritionist.
If you do it for more than a couple weeks, you will need to supplement.
I can't really help you with the recipe because Ellie's is 24% protein.
Also, kidney diets have low phosphorus.
When you start getting into all of that, it is best to talk to a nutritionist.
If it was me (and this is just my opinion), I would feed a prescription diet (not necessarily K/D) until you retest. If it retests normal, then they will probably tell you to go back to his regular food. If it retests abnormal and this will be a long-term thing, then I would consult the nutritionist. I wouldn't want to see you spend $100-$200 and find out you didn't need the recipe in a couple of weeks.