A simple everyday meal can become a festive dish if it is presented as a cake. Simply by using a cake mold, place several layers of different foods and decorate the top.
The cake allows for different variants. The image shows one made of potatoes, spinach, salmon, egg and salad.

A healthy and funny way to make a sandwich of only raw vegetables.
 

In order to make healthy food more attractive and special for Christmas meals, there are several options of decorating into different pretty wreaths using different kinds of fruits and vegetables.
I suggest to you one sweet option and two savoury Christmas Wreath options.

Pumpkin is one of the only carbohydrates that are allowed in GAPS diet, so take advantage of this!
Pumpkin may be prepared in very different ways: boiled, baked, fried; and it may be used in both savoury and sweet dishes.
Here are some recipes with pumpkin that I suggest:

 

These tarts are made without any kind of flour. An apple is used for the tart base or crust, in which a filling that could be fruit puré or chocolate or whatever one wishes can be filled with;  and on top there is fruit like strawberries, blueberries or raspberries.