Preheat oven to 350 degrees F (180 C).

Line a baking pan with parchment paper.

Sift whole wheat flour into a bowl.

Stir in finely grated Parmesan cheese and minced fresh Italian parsley.

Add egg yolk, extra virgin olive oil, and water.

Stir until well combined.

Turn dough onto a lightly floured surface and knead until smooth.

Divide the dough into two portions.

Roll out one portion between two sheets of parchment paper to approximately 5mm thickness.

Use a 5cm fluted cutter to cut out crackers.

Carefully place the crackers on the prepared baking sheet.

Bake for 20-25 minutes, or until light golden brown.

Let the crackers cool on the tray for 10 minutes.

Transfer to a wire rack to cool completely.

Repeat the process with the remaining portion of dough.