Step 1

Arrange a rack in the middle of the oven and heat to 350°F. Coat a 9x13-inch rimmed baking sheet with oil or butter; set aside.

Step 2

Peel the bananas, place on a plate, and mash with the back of a fork until smooth. Scrape into a large bowl. Add the sugar, oil or butter, eggs, almonds, applesauce, and milk. Stir together until well-mixed. Add the baking soda, baking powder, salt, flour, and poppy seeds. Fold together until no floury patches remain.

Step 3

Pour the batter into the prepared baking sheet and sprinkle with the sunflower seeds and walnut pieces. Bake until well-risen and golden-brown — a toothpick inserted into the center should come out clean, 35 to 40 minutes.

Step 4

Drizzle the cake with the melted chocolate and leave to cool and set. Once cooled, cut into 9 to 12 pieces.