Whisk the bananas in mashed potatoes in any convenient way.
Mix banana puree with seeds.
Cover the baking sheet with parchment and oil. Transfer the cooked mass and smooth. With the dull side of the knife, make indentations in the form of squares. Dry the kozinaki in the oven at 120 ° C for 1.5-2 hours.
Chill and serve ready-made kozinaki.