Roast the raw walnuts on low-medium heat until they are a little darker and crispy. Set aside and let cool.
Grate and try to press out any excess moisture by putting it into a large sieve or strainer, then weigh out, cover and set aside.
Zest the lemon(s), cover and set aside.
STEP 2: DRY MIXTURE
In a medium-sized bowl, whisk the flours, salt, baking powder, and baking soda together until well combined.
In a separate medium-sized bowl, sift the dry mixture using a strainer or sieve so that it is nicely aerated. This also serves to remove any of the almond bits that might be slightly chunky.
STEP 3: WET MIXTURE
In a large-sized bowl, beat the eggs and oil together on high-speed for 1-2 minutes.
Add sugars and continue beating on high-speed for 2-3 minutes.
Add vanilla extract and lemon zest and beat for about a minute.
STEP 4: COMBINE INGREDIENTS
Remove the electric mixer and use a spatula to gently fold in the aerated dry mixture in 2-3 separate batches.
Fold in the zucchini and walnuts.
STEP 5: BAKE
Time to pour your batter into your loaf tin.
Put your tin in the middle of the oven and set a 30 minute timer.
After 30 minutes, rotate your tin 180 degrees and set another 30 minute timer.
Test your cake with a cake tester. It's done when it comes out clean.
It is typically ready after a total of 60-75 minutes, depending on how moist your zucchini was, tin shape and oven. The top should have formed a nice crust, but not too thick, just sturdy enough to handle all the delicous glaze that's coming.
Take out your tin and place it on a cooling rack where you will let it cool for 10 minutes before taking out.
STEP 6: GLAZE
Microwave the lemon juice, caster sugar and butter in a small bowl for 30 seconds (or heat gently in a sauce pan).
Add the confectioners sugar and whisk together until completely combined.
Once the loaf cake is out of the tin and on a cooling rack, drizzle the glaze on top.
For bonus flavor and presentation, sprinkle more lemon zest and crunched up pan-toasted walnuts on top.
Serve and enjoy!
TIP! Slice the remaining loaf and place in airtight containers with a little parchment paper in between the layers so you can easily freeze and/or warm up for breakfast or snacks later.