Preheat the oven to 400°F (200°C).
Place all the paste ingredients into a food processor or high-speed blender, adding only half of the coriander leaves, and blitz to a smooth consistency. Set aside until needed.
Cook the rice until just cooked, then drain.
Transfer the rice into a baking tray and cover with the paste, mix well to combine.
Top the rice with the fish fillets and the green beans, then cover with tinfoil and bake in the oven for around 20 minutes, or until fish is cooked through and beans are tender.
To serve, divide between 4 plates, sprinkle with the spring onions, chili and remaining coriander leaves.