Core and dice the apple into small, bite-sized pieces.
In a small skillet over medium heat, melt the ghee and add the diced apples, cinnamon, and nutmeg.
Sauté the apples for 5-7 minutes, stirring occasionally, until they are tender and golden brown.
In a small saucepan, combine the rolled oats, water, and sea salt; bring to a gentle simmer over medium heat.
Once the oats have absorbed most of the water, slowly whisk in the liquid egg whites, stirring constantly to prevent scrambling.
Continue to cook and stir for 3-4 minutes until the mixture is thick and creamy.
Remove the saucepan from the heat and fold in the Greek yogurt until fully incorporated and smooth.
Transfer the oatmeal to a bowl and top with the warm caramelized apples.