Preheat oven to 400°F. Grease a large baking dish and set aside.
Add oats, brown sugar, baking powder, cinnamon, allspice and mix together. Pour in milk, eggs, applesauce, shredded apple, cranberries, and walnuts.
Stir all ingredients together until well mixed. Use a spoon to flatten the top of the oat mixture.
Bake for 30-40 minutes, or until top is golden brown.
Click on the time in the instructions to start a timer!
Bake uncovered. Baking dish should be at least 13 x 9-inches.