Wash the pumpkin thoroughly, halve lengthwise, remove seeds. Peel onion and cut into thin slices. Peel garlic and chop finely. Wash, clean and chop the chilli. Wash rosemary, shake dry, pluck needles from the stems and chop
Spread the pumpkin on a small baking tray or an ovenproof casserole dish. Season with salt and sprinkle with the remaining ingredients. Sprinkle with oil. Bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for approx. 45 minutes