[header] How to make pumpkin and roast capsicum soup [title] Roast your capsicums over an open flame until blackened. [step] It's generally easiest to put them over an exposed stove flame with the fan ventilator going to remove any smoke as it is quite pungent. You may also barbecue them or grill/broil them. 
Turn them regularly with tongs to ensure even charring. [title] Place the capsicums in a bowl and cover with cling film, or place in a plastic bag to steam.