Step 1

Preheat oven to 180C. Cook the pasta in a saucepan of boiling water for 3 mins less than packet directions. Drain, reserving 1/4 cup (60ml) of the cooking liquid.

Step 2

Meanwhile, heat the oil in a frying pan over medium heat. Cook the onion and mushroom, stirring, for 5 mins. Stir in spinach and cook for 2 mins or until spinach wilts.

Step 3

Place pasta in a bowl. Stir in pasta bake sauce, reserved cooking liquid, tuna and mushroom mixture. Season. Spoon into a 12-cup (3L), 20cm x 30cm ovenproof baking dish. Top with mozzarella. Bake for 20 mins or until golden and heated through. Sprinkle with parsley to serve.