My son too has a mild case of pku and is 2. He does drink a special formula but has a very lenient diet that requires no medical food and up to 1500 mg of phe a day or about 30 grams of protein. I remember the baby jar food days and only being able to give him the fruits and vegetables but my nutritionist assured me that although I wanted him to have more variety he didn’t need it nor did he notice it. The diet probably seems boring to you because of the lack of variety but it is just fine. In just a few short months when the baby starts eating table food you will have more choices.