Pumpkin is one of my favourite ingredients for soup because it’s versatile, cheap and easy to work with. This spiced roasted pumpkin and zucchini soup is a perfect example of a simple and economical dinner you can make on a weeknight. This soup is naturally gluten-free and can be made vegan if you use dairy-free yoghurt and vegetable stock. Add a source of protein (e.g. boiled eggs, lentils or chickpeas) to round off the meal.