Place entire frozen contents into oven-safe pan. Turn oven on to 400F convection and set timer for 12 minutes. Peel, dip and enjoy immediately.
Bring large pot of water to a boil. Separate prawns from butter and melt butter in small pan on medium-low heat. Once water is boiling add frozen prawns, turn off heat and set timer for 4 minutes. Strain, peel, dip and enjoy immediately.
Thaw in fridge overnight. Follow either previous method, but change time to 8 minutes for roasting or 30 seconds for boiling.