1. Preheat the oven to 160°C (fan setting).
Rinse and dry the tomatoes and coriander.
Peel the shallots and garlic cloves.
2. In a baking dish (about 20 x 30 cm), arrange the whole cherry tomatoes, peeled garlic cloves, shallots cut into 3 cm pieces, coriander cut into 4 cm pieces (reserve about ten leaves), thyme, and cinnamon sticks.
Drizzle with olive oil, add half of the salt and a few turns of black pepper, then bake for 1 hour.
3. Bring the water to a boil so it's ready when the oven "dings."
Remove the dish from the oven and increase the oven temperature to 220°C.
4. Pour a regular layer of rice over the vegetables (without mixing), add the remaining salt, pepper, then gently pour the boiling water.
Cover tightly with aluminum foil. This step is crucial: it's the steam that cooks the rice.
Bake for 25 minutes until the rice has absorbed all the liquid.
5. When done, let it rest for 10 minutes without removing the foil. Then remove the foil, sprinkle with the remaining chopped coriander, mix gently, and serve!