Step 1

Mix the ingredients: Add the oats, milk, applesauce, walnuts, eggs, maple syrup, vanilla, cinnamon, baking powder and salt to a large bowl. Mix well.

Step 2

Layer in a casserole dish: Lightly grease a 7x11 inch rectangular baking dish. Spread half the oat mixture in the bottom of the dish. Sprinkle with about 3/4 of the blueberries. Top with the remaining oat mixture, carefully smoothing the top. Sprinkle on the remaining blueberries. You can also sprinkle on some extra walnuts if you like!

Step 3

Chill the dish: Cover the casserole dish and chill in the refrigerator overnight (see notes for instructions to bake right away)

Step 4

Bake the dish: The next morning, remove the dish from the fridge. Preheat the oven to 350°F. Bake until set and golden on top, about 30-35 minutes. Rest for 5 minutes on a rack on the counter, then slice and serve warm.