Mix the wet ingredients: Preheat your oven to 375°F or 190°C. Grease a 8 x 8 inch or similar baking dish.In a large bowl, mash 2 ripe bananas well. Add 1 cup Greek yogurt, ½ cup milk, ¼ cup honey, 1 large egg, and 1 teaspoon vanilla extract. Whisk until smooth.
Add the dry ingredients: Stir in 1½ cups carrots (finely grated). Add 1½ cups rolled oats, ¼ cup raisins, ½ cup walnuts , 1 teaspoon baking powder, 2 teaspoons cinnamon, ½ teaspoon ground ginger, ¼ teaspoon ground nutmeg, and a pinch of salt. Mix well until everything is combined.
Assemble: Pour the mixture into the baking dish. Spread it out evenly with a spoon. Sprinkle more walnuts or raisins on top if you like.
Bake and rest: Bake at 375°F or 190°C for about 40 minutes. The center should feel set but still soft. Let it rest for 15 minutes before slicing so it holds together nicely.
Substitutions
Ripe bananas → Applesauce (less sweet and softer texture)
Rolled oats → Quick oats (smoother texture)
Carrots → Zucchini, squeezed dry
Greek yogurt → Low-fat Greek yogurt, Skyr, or dairy-free yogurt
Milk → Almond milk, oat milk, or soy milk
Honey or maple syrup → Use either one for sweetness