Preheat the oven to 220°C. Whisk 2 tbsp of the oil with the vinegar, sugar, salt and pepper in a large bowl, whisking until the sugar dissolves. Using a spiraliser or julienne peeler, cut the zucchini into noodles and add to the bowl, tossing well to combine. Set aside to soften
Combine the mushrooms, cherry tomatoes and capers on a large oven tray lined with baking paper. Drizzle with the remaining oil, season with salt and pepper and toss well to combine. Roast in the oven for 15 minutes or until the mushrooms are cooked and the tomato skins have burst.
Remove from the oven and pour the mixture into the bowl with the zoodles, including any pan juices and toss well to combine. Mix in the olives if using, top with basil and serve