In a bowl, mix flour, sugar and baking soda.

Add the lemon zest.

Moisturize flax meal with ¼ cup warm water and add the vanilla extract.

Add coconut oil and flax to the bowl of flour, mix to form a dough.

If you need a little water to make the dough, add and knead slightly.

Form a tube with the dough and cut into 16 "wheels."

Place the cookies on a baking sheet with parchment paper.

With the help of a spoon make a little hole in each cookie gently pressing each cookie in the center.

Place a teaspoon of jam on each cookie.

Bake in preheated oven at medium temperature (180 ° C) for 20 minutes.

Cool and serve with a nice cup of tea.