Preheat oven to 200°C. Place a piece of baking paper over a tray. Place the whole tomatoes and thyme into a mixing bowl. Drizzle with olive oil and toss until evenly coated. Season to taste with salt and pepper then spread evenly onto the prepared baking tray. Bake tomatoes in the preheated oven for 15-20 mins or until the skins pop and start to brown.