Banana Mochi (香蕉糕)

Place the bananas in a large bowl and mash them into a paste. Add the sugar, oil, and water and mix. Add the glutinous rice flour and rice flour and combine into a thick batter. Steam for 25 minutes over medium heat. Meanwhile, toast the glutinous rice flour in a pan over medium-low heat until it takes on the slightest yellow hue and smells toasty, about 3-5 minutes. Remove the dough from the steamer and while still hot, knead the mixture with a spoon or spatula until it starts to pull away from the sides of the bowl, about 3-5 minutes. Heavily dust a work surface with the toasted flour and place the dough onto the flour, covering all surfaces. Roll the dough out until it is a rectangle with about 0.5 cm (1/4 inch) thickness. Make sure every surface is covered in the toasted flour. From the long side, roll the dough up until it forms a long log. Cut into your desired shapes.