01 - Preheat oven to 350°F. Line a standard 12-cup muffin tin with paper liners or grease thoroughly with cooking spray.
02 - In a large mixing bowl, whisk together rolled oats, baking powder, ground cinnamon, and salt until evenly distributed.
03 - In a separate bowl, whisk applesauce, milk, eggs, honey or maple syrup, melted coconut oil or butter, and vanilla extract until smooth and well combined.
04 - Pour wet ingredients into dry ingredients. Stir until fully incorporated and oats are evenly coated.
05 - Gently fold in desired add-ins such as blueberries, diced apples, chopped nuts, chocolate chips, or dried fruit.
06 - Divide oatmeal mixture evenly among prepared muffin cups, filling each about 3/4 full.
07 - Bake for 22 to 25 minutes until cups are set and lightly golden on top. Remove from oven and let cool in pan for 10 minutes before transferring to wire rack.
08 - In a small bowl, mix Greek yogurt with honey or maple syrup until smooth and sweetened to taste.
09 - Once oatmeal cups have cooled completely, top each with a spoonful of sweetened Greek yogurt and garnish with fresh berries or fruit.