Preheat the oven at 180C/400F. Cut the potatoes in cubes and the zucchini in big pieces.

Fill a bit pot with water, bring to boil. When the water is boiling add the potatoes and cook for 10 minutes.

Add the zucchini and keep cooking for 5 min (15 min total).

Drain the vegetables and place them in a big bowl.

Using a fork mash the potatoes and the zucchini, set apart.

In a food processor add the ham in pieces, the ricotta cheese and the milk. Puree' everything for 2 minutes to create a smooth consistency.

Add the ham mix to the vegetable mix.

Also add the breadcrumbs. Stir well.

Cut the mozzarella cheese in short sticks, 2 inches long.

Place 1 Cup of breadcrumbs in a dish. Place 1 Tablespoon of ham/veggie mix in your hand. Press one mozzarella stick in the center and cover it with the mix.

Roll the croquette in your hands to give it a smooth shape. Coat the croquette with the breadcrumbs and place in on a parchment paper on a baking sheet.

Drizzle some extra virgin Olive oil on top and bake at 400F/180C for 25 minutes.

Flip the croquettes once after 15 minutes in order to have a crispy skin on both sides. If you want, you can also add 5 minutes at the end in broiling mode to have that nice golden crispy color!