1-Preheat your oven: Preheat your oven to 350°F (175°C). Prepare your baking pan by greasing it lightly or lining it with parchment paper.

2-In a large bowl: combine the rolled oats, whole wheat flour, baking soda, cinnamon, and brown sugar. Mix well to ensure even distribution of ingredients.

3-In a separate bowl: whisk eggs, milk, and unsweetened applesauce until smooth. For vegan adaptations, use flax eggs and plant-based milk.

4-Gradually add the wet ingredients: to the dry ingredients, stirring gently to form a uniform batter without overmixing.

5-Pour the batter: into the prepared pan, smoothing the top with a spatula. For gluten-free options, ensure the batter maintains the same consistency by adjusting liquid as needed.

6-Bake: for 30-35 minutes until a toothpick inserted in the center comes out clean. Adjust cooking time slightly based on oven differences and dietary modifications.

7-Allow the cake to cool: for 15 minutes before serving. This oatmeal cake is delicious warm or at room temperature, suitable for any dietary preference with proper adjustments.