Preheat the oven to 220°C / 200°C fan bake and line a baking tray with baking paper
Dice the onion, finely chop the garlic, pick the thyme leaves, and zest the lemon
Bring a frying pan to medium heat with a drizzle of olive oil, add the onion cooking until softened - approximately 4 minutes
Add the garlic, thyme, zest, and chilli flakes (if using) and cook until fragrant - approximately 1 minute
Add the Arborio rice and stir until coated
Add the water and chicken stock, bring to the boil
Transfer all the contents in the pan to a baking dish, cover tightly with tin foil and
Place in the oven, baking until tender - approximately 25 minutes
While the risotto is cooking drain the tomatoes and lay flat on the prepared tray, drizzle with olive oil, season with salt and pepper and insert into the oven above the risotto for 15 minutes
When the risotto is ready remove from the oven, adding a splash of water to loosen if needed
Grate in the parmesan cheese, add the butter, baby spinach leaves and tomatoes, stir to combine
Divide between bowls and garnish with the lemon wedges