Prepare ingredients and stock: Finely dice the onion, slice or mince the garlic, core and quarter the tomatoes. Keep the stock simmering in a small saucepan next to your stove so it’s hot when you add it to the rice — hot stock prevents stopping the rice from cooking and helps the starches release smoothly for a creamy texture.

Quick-confit the tomatoes: Heat 2 tablespoons of olive oil in a wide sauté pan over medium-high heat until shimmering. Add the tomato quarters, cut side down, and let them sear undisturbed for 3–4 minutes until they caramelize and their juices begin to concentrate. Turn and cook another 1–2 minutes just to soften the skins but keep their shape. Remove the tomatoes to a bowl and reserve. This step concentrates tomato sweetness and develops a deep umami edge without long slow cooking.

Sweat the aromatics: In the same pan, lower heat to medium, add the remaining 1 tablespoon olive oil and the diced onion. Cook gently for 4–5 minutes until translucent and soft (not brown) — sweating releases the onion’s natural sugars and creates a sweet base. Add the garlic in the last 30–45 seconds and cook until fragrant. Avoid browning the garlic to prevent bitterness.

Toast the rice (bloom the starch): Add the Arborio rice to the aromatics and stir to coat every grain with oil, toasting for 90 seconds. Toasting warms the grains and starts to “bloom” the starch so when liquid is added the rice releases a silkier creaminess rather than becoming gluey.

Deglaze and start adding stock: If the pan is dry, add one ladle (about 120 ml) of hot stock and scrape up any fond (browned bits) — these carry concentrated flavor. Stir until the liquid is almost absorbed. Then continue to add the hot stock, one ladle at a time, stirring frequently and waiting until each addition is mostly absorbed before the next. This controlled addition encourages the rice to exude its starch gradually, giving you a glossy, creamy risotto in about 18–20 minutes total cooking time.

Fold in the tomatoes: When the rice is about 2 minutes shy of the target 'al dente' tenderness (creamy but with a slight bite at the center), fold in the quick-confit tomatoes and any juices. Stir gently to combine. Heating the tomatoes into the rice for a couple minutes allows their flavor to meld without disintegrating them completely.

Finish for silkiness and brightness: Remove the pan from the heat and stir in the butter and lemon juice to emulsify and add shine; finish with most of the torn basil (reserve a few leaves for garnish). Season to taste with salt and pepper. Rest the risotto for 1 minute — this short rest lets the texture even out and the flavors marry.

Plate and garnish: Spoon the risotto into warm shallow bowls, scatter the reserved basil, a drizzle of good olive oil if desired, and a few cracks of black pepper. Serve immediately — risotto is best enjoyed right away when the texture is luxuriously creamy.