Cut squash in half lengthwise; discard seeds. Drizzle with oil and season with salt and pepper. Place squash cut side down on a lined baking tray. Bake, uncovered, at 205C° until squash is easily pierced with a fork, 30-40 minutes. Turn squash cut side up. Bake 5 minutes longer or until squash is tender.
Meanwhile, in a Dutch oven, saute red pepper, onion, courgette, mushrooms, leek and carrots in oil until tender. Add garlic; cook 1 minute longer. Add the stewed tomatoes, tomato paste, V8 juice, pepper and salt; bring to a boil. Reduce heat; cover and simmer for 15 minutes. Stir in spinach and herbs; heat through.
When squash is cool enough to handle, use a fork to separate strands. Serve with sauce; sprinkle with cheese.
