Baked Oatmeal with Fruit

From Annie's Eats
This reheats wonderfully for breakfast on the go all week long.  It also easily doubles for weekend guests and any combo of fruit/nuits/dried fruit works well.

1 cup old fashioned rolled oats
¼ cup chopped walnuts or pecans, lightly toasted, divided
½ tsp. baking powder
¾ tsp. ground cinnamon
Pinch of salt
¼ cup maple syrup
1 cup milk
1 large egg, lightly beaten
2 tbsp. unsalted butter, melted and cooled slightly
1 tsp. vanilla extract
2-3 ripe bananas, peeled and sliced ½-inch thick
1 cup blueberries (fresh or frozen), divided

Preheat the oven to 375˚ F. Lightly grease a 2-quart baking dish. In a medium bowl, combine the rolled oats, half of the nuts, baking powder, cinnamon and salt. Stir with a fork to combine. In a liquid measuring cup, combine the maple syrup, milk, egg, butter, and vanilla. Spread the sliced bananas in a single layer over the bottom of the baking dish. Top with half of the berries. Sprinkle the dry oat mixture over the fruit in an even layer. Pour the liquid ingredients evenly over the oats. Sprinkle the remaining nuts and berries over the top. Bake for 35-40 minutes, until the top is browned and the oats have set. Let cool 10 minutes before serving.