Banana Blossoms have been used in south asian and south east asian cooking. They're a great way to get the family together around food as working with the flowers takes many hands. Traditionally, after work, everyone sits around chatting about the day, separating stigma and sepal from the flower (the two tough parts of the flower).
 
Sharing a few of my favourite recipes for this flower: 
Sri Lankan vegan curry 
Thai blossom salad