Steps
- Preheat the oven to 190°C (170°C fan-forced). Lightly grease a 2L (8-cup) ovenproof baking dish with oil spray.
- In a large saucepan, heat the olive oil over medium heat. Add the onion, celery, and carrot, and cook, stirring, for about 5 minutes until softened. Add the zucchini and green beans, cooking for another 2 minutes until just tender. Transfer the vegetables to a bowl and set aside.
- Using the same pan, melt the olive oil spread over medium heat. Stir in the flour, combining well, then gradually add the milk while stirring continuously until smooth. Bring the mixture to a boil, then reduce heat and simmer, stirring, until the sauce thickens. Mix in the cooked vegetables, tuna, and half of the parmesan. Season to taste.
- Spread the cooked rice evenly over the base of the prepared baking dish. Layer the spinach over the rice, followed by the tuna and vegetable mixture. Sprinkle the remaining parmesan on top. Bake for 20 minutes or until golden and bubbling. Let it sit for 5 minutes before serving with mixed salad leaves.