The first time I attempted the diet I lost 8 lbs in 1 week! (My weight averaged about 110 lbs.) The second time I started, I added in eggs from the start, ate at least one avocado a day and made a lot of egg or chicken salads with homemade mayo to add fat. I also started the coconut bread a week into the diet. (I think the recommendation is to wait for 2 to 3 weeks.)

I now add a lot of coconut oil (at least 2 tsp on each slice of coconut bread) and only whole milk yoghurt (you need to wait with this too. Check the protocol/allowed foods list.) I actually look out for foods that have the good fats in them!

The best recommendation I can give you is to start with a very filling breakfast. That sets the stage for the rest of the day. Browse the recipe breakfast ideas. My goto breakfast is an omelet with sauteed greens (kale, spinach with a sliced onion.) You saute the onion and greens, beat two eggs with herbs, pepper and salt. Add a chopped garlic clove to your sauteed veggies and poor the omelet mixture on top and bake until set. I eat this with mayo as well. Then if you are still hungry, you could have some avocado, coconut bread maybe or a side salad.
I still snack a lot between meals: kale chips, rutabaga, cauliflower, a bowl of guacamole, coconut bread with coconut oil. I also add at least one cooked veggie to my salad if I am not eating chicken or fish. For instance, a mixed greens salad with raw cauliflower and sauteed fennel on top is most delicious and much more filling than salad alone.
I've been able to keep my weight steady around 108 - 109.

Good luck

Thanks Lorelei! I will use your advice when I start the diet again :)

Raster - when did you add almond butter? I've started introducing bits & pieces anad haven't braved this yet. I also have pumpkin seed butter that I bought at the beginning not realising it was a no no. What do you think? (I'm 3 months in, 99% symptom free, have tried blanched then roasted pumpkin seeds and was fine)