Place tamale wrapped in clingfilm in the microwave. If you have made them using corn husks, place in a zip-lock bag with a little water. Microwave on high for 1 1/2 minutes. I find this is aedequate for a small tamale (i.e. about 10cm long and 5 cm wide). If you have a bigger tamale and/or the dough looks wet, cook for another 30 seconds or until ready. Leave for 5 minutes before carefully unwrapping and devouring.
Photo credit: Warm 'n fuzzy