Heat a pan over medium heat. Add the oatmeal, sunflower seeds, and sesame seeds. Toast for 3–5 minutes, stirring occasionally, until golden brown. Transfer to a plate and let cool for about 2 minutes.
Put the applesauce in a bowl and pour the yogurt on top.
Wash and core the apple, then cut it into small pieces. Spread the apple pieces over the yogurt.
Top with the cooled oatmeal and seed mixture. Sugar is optional.