Boil potatoes until soft.
While potatoes are boiling, peel and grate the zucchini.
Remove the water out of the grated zucchini by using a cheesecloth. Do it in batches for easier handling.
Place the squeezed, grated zucchini in a medium to large mixing bowl.
Once the potatoes are ready, drain the water from them. Use a potato ricer to mash the potatoes and add them in the mixing bowl, with the zucchini.
Add the rest of the ingredients EXCEPT the 1 tablespoon of breadcrumbs for sprinkling.
Mix, just enough to combine.
Preheat oven to 200°C (375°F).
Take a tablespoon of the mixture, roll it into a ball and flatten the ball on top of a tray, lined with a baking sheet.
Sprinkle breadcrumbs on top of the bites.
Place baking tray in the oven for 30 to 35 minutes, or until they get darker in color.