Ask students to predict what the characters are going to do with the flowers and leaves they picked. You can tell them that the characters are picking wild yarrow and share the recipe at the back of the book. Read the recipe together.
Make tea or a drink with the class. Then create success criteria based on the essential elements of a recipe. Do a shared writing activity as a class, creating your own recipe to follow for a drink. This can be extended to other recipes and individual writing opportunities.