First of all add salt and baking powder in flour and mix well. Keep aside for later use.
Now add baking soda to yogurt mix and give a quick stir. Keep aside.
Now mash banana with a fork. Add vanilla essence, sugar and oil. Mix well till sugar is dissolved.
Now take 1/2-1/2 tsp of yogurt mix and banana mix in a separate bowl. Add 1 tbsp of flour mix and red colour, stir to make a lumpless smooth batter. If needed , add few drops of water to get nice smooth batter.
Transfer this to a piping bag and make desired pattern on a rectangular/square baking tray lined with butter paper. Keep it in freezer for atleast 6 mins and maximum 10 mins.
** You can make pattern on only half the tray as only this will be visible. I had extra batter in hand so made on full tray.
** Don't decrease the freezing time otherwise pattern will not be so clean. I removed earlier that's why my pattern got smudged a little.
Now take the patterned tray out . Now add yogurt mix in banana mix followed by flour. Mix everything together to get smooth lumpless batter. If needed add some water to get nice cake like batter.
Now pour this batter on patterned baking tray. Spread it evenly and tap to release any bubble trapped.
Now bake for 8-10 mins at 180 degree C in a preheated oven.
** Always keep checking for doneness by tapping on its top. If it feels spongy and non sticky then it's done. Over baked rolls get cracks while rolling.
Remove from oven and carefully invert on a kitchen towel dusted with powdered sugar to avoid sticking.
Now reinvert it carefully on dusted towel to get patterned side downwards.
Roll it carefully along will towel and make a log. Refrigerate for 1/2 - 1 hr.
Now open the roll carefully and spread Nutella all over it. Again roll to make log.
Now cut in desired thickness roll and enjoy these beauties with family and friends.
** You can make any filling of your choice like cream, jam, hung curd etc.
These are not only yummy but also an eye treat for everyone.
Do try this easy yet super tempting eggless delight and don't forget to share how's it turned out for you.