Banana Bread

I got this recipe at school in Family Studies (Home Economics). It was in metric but I converted it because I don't have metric measuring spoons anymore.

3 large bananas
3/4 cup white sugar
1 egg
1 tsp. baking soda
1/2 tsp salt
1 1/2 cups flour
1/3 cup melted butter

Mash bananas. Add sugar and slightly beaten egg. Add melted butter. Add dry ingredients.

Bake 350 F for 60 mins.