Preheat oven to 375F
Peel and mash bananas together with the vanilla in a medium-size bowl.
Add egg, mix together
Add yeast, mix together
In a separate bowl, mix together the flour and salt.
Add melted butter to banana mixture, and combine
Combine flour and banana mixture
Knead until dough comes together
Form into a ball and place inside a lightly greased bowl, cover, and set in a warm place to rise
Once dough has doubled, remove from bowl and shape into rolls
Place rolls in greased baking dish, cover, and allow to rise
Bake in 375F oven 15-20 minutes