Also, whatever diet you choose we have found it best to do a slow reintroduction of foods and not open the flood gates. With my first daughter we chose 1 or two items and added those each week. The rest of her calories she got from formula, My second daughter did a percentage add. First four weeks 20% food 80% formula and so on.
Just a quick comment on almond milk. That is the milk we use in our house. As Lady Organic said, try to stay away from carrageenan. Also best to try to avoid added sugars...usually in the vanilla varieties.
Also, almonds sold in the US are required to be pasteurized. Currently there are two main methods being used to pasteurize the almonds. One uses steam to sanitize, the other uses the chemical propylene oxide, aka PPO, which is considered a possible carcinogen.
Products are not required to list which process they use. You can either call the manufacturer, buy organic or make your own with organic nuts. Pacific is a huge marketer of almond milk. Do to market pressure they recently switched over to using organic nuts, however, they still use carrageenan. There are others who don't use carrageenan but the nuts are pasteurized with PPO. The only manufacturer I have found that offers organic and no carrageenan is Whole Foods store brand.
Good luck with the PEN...are you using it as mono therapy or are you also using a maintenance med? Was she able to achieve remission on the initial 8 weeks of EEN? Good for her for completing the EEN! She should be very proud of herself.