Boil the green papaya chunks for 30 minutes then drain and mash, season with salt and black pepper.
In a skillet over medium heat, warm the olive oil then cook the carrots, peppers, garlic and onion for 2-3 minutes.
Stir in the vegetable stock, tomato purée, thyme, parsley, black pepper and basil leave. Cook for 20 minutes.
Stir in the corn and peas and cook for 10-15 minutes more.
Preheat the oven 200°C/400°F.
Pour the veggie base into a baking pan then top with the green papaya base.
Bake for 30-35 minutes then cool for 10 minutes.