Place mince, mixed herbs, zucchini and carrot in a bowl and mix well to combine. Roll into 40 evenly sized balls.
Put a large frypan over medium heat and add the oil. Place the meatballs into the pan and gently fry for 5 to 10 minutes, turning as needed until the outsides are golden brown.
Pour the passata over the meatballs. Reduce the heat to low and simmer for 15 to 20 minutes until the meatballs are cooked through and the sauce has reduced and thickened. Check seasoning and adjust if needed.
Using a bread knife carefully make a cut lengthways down the centre of the bread rolls. Be careful not to cut all the way through.
To serve, place 4 meatballs in the centre of each bread roll and sprinkle with grated cheese.
Serves: 10
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