Preheat the oven to 200°C conventional oven/ 180°C fan-forced (400° Fahrenheit/Gas 6). Line a baking tray with baking paper.
Place the pumpkin and half of the olive oil in the baking tray. Season with salt and mixed herbs, then toss to combine. Cook until the pumpkin is just tender (approximately 20-25 minutes). Set aside.
Wash the spinach well, then drain. Melt the butter and remaining olive oil in a large frying pan. Add the onion. Cook, stirring, for a few minutes until the onion is soft. Add the spinach and chickpeas, cook for 1-2 mins, until the spinach has wilted and the chickpeas have heated through. Stir in the cooked pumpkin and season to taste – buon appetito.