Diet trouble because of my Hyperphe, anyone here have Hyperphenilalaninemia or PKU?

I have something called Hyperphenilalaninemia, it’s a metabolic thing. And just to keep things simple, I can’t eat a lot of protein. My body can’t process it easily, so I can only have a set amount everyday. 35g if protein a day, so it’s hard to diet and just eat in general when dairy, grain, meat, fish, poultry, fruit, and vegetables have quite a lot of protein most of the time. Help?!