Step 1

Preheat the oven to 375ºF. Mash the bananas well with a fork (you'll need 1.5 cups).

Step 2

Add the mashed bananas to a large bowl along with the brown sugar, eggs, salt, vanilla, baking powder, cinnamon, nutmeg, and salt. Whisk until the ingredients are combined.

Step 3

Add the milk and whisk until combined again.

Step 4

Finally, stir in the rolled oats and chopped walnuts.

Step 5

Pour the oat mixture into a 9x9-inch casserole dish and transfer to the preheated oven. Bake for 45 minutes, or until it is golden brown on top and around the edges.

Step 6

Serve warm or refrigerate and enjoy cold!