Grease and line medium loaf tin, or 20cm round cake tin
Preheat oven to 150 degrees fan forced, and place rack into middle of oven
Place carrots into TM bowl and chop 3 seconds / speed 6
Put aside, but if you see some large chunks return them to TM bowl and chop 1 second / speed 6 and add to the other carrots
Do not wash bowl
Place all other ingredients except carrots and walnuts (if using) and mix 10 seconds / speed 5
Scrape down sides and add carrots and walnuts (if using), and mix 10 seconds / reverse / speed 5
Pour batter into loaf or cake pan, level top and sprinkle extra walnuts or seeds (for nut free) over the top if you are not using the icing, and bake for 1 hour (test, and you may need an extra 10 minutes but in my oven an hour is usually perfect … this time is for both the loaf and round tin).
Rest in cake pan for 20 minutes, then place onto cooling rack to cool completely before frosting if using
Cake keeps well for a few days, do not refrigerate