Preheat oven to hot, 200C.
In a large bowl, combine mince, breadcrumbs, egg, onion, zucchini, pine nuts, parsley, sauce and thyme. Season to taste. Roll into 4 oval-shaped meatloaves.
Cut half of the mozzarella into 8 cubes. Grate remaining cheese. Press 2 cubes of cheese into the centre of each meatloaf, re-shaping. Place in a baking dish.
Bake for 25-30 mins until browned. Pour over pasta sauce and sprinkle with cheese.
Bake for a further 5-10 mins until cooked through and cheese has melted. Serve with rocket and chips.