Dice potato and start cooking in a steamer
Meanwhile, finely chop broccoli and grate the zucchini and carrot.
When potatoes are a few minutes off being done, add broccoli, zucchini and carrot into the steamer.
Once veggies are cooked, mash well and put in the fridge to cool down a little.
Once cool, add cheese, breadcrumbs and egg. Mix well.
Roll tablespoon sized amounts into balls and roll in the extra breadcrumbs to coat.
Heat a little olive oil in a frying pan and place burgers in, using spatula to flatten.
Fry on medium heat for about 3 minutes each side, until golden brown.