Creating the Oatmeal Apple Breakfast Bake can be straightforward if you follow these simple steps:

1. Preheat Your Oven: Set your oven to 350°F (175°C) and grease a 9×13 inch baking dish.
2. Mix Dry Ingredients: In a large bowl, combine the oats, brown sugar, cinnamon, nutmeg, baking powder, and salt. Stir until well combined.
3. Prepare Apples: Peel and dice the apples, then add them to the dry ingredients. If using, fold in nuts and dried fruits at this stage.
4. Combine Wet Ingredients: In another bowl, whisk together the almond milk and vanilla extract until mixed thoroughly.
5. Combine Wet and Dry Mixtures: Pour the wet ingredients into the bowl of dry ingredients and stir until fully combined.
6. Transfer to Baking Dish: Pour the mixture into the greased baking dish and spread it evenly.
7. Bake: Place in the preheated oven and bake for 40-45 minutes or until the top is golden brown and the oats have set.
8. Cool: Remove from the oven and let it cool for about 5-10 minutes before serving. This will help it hold its shape.
9. Garnish: If desired, add fresh apple slices on top for garnish.
10. Serve: Scoop into bowls and enjoy warm, perhaps topped with a drizzle of honey or a dollop of yogurt.

These steps will guide you in creating this incredible breakfast bake effortlessly.