Place apple slices in a microwave-safe container. Top with 1/2 of the butter. Sprinkle the nutmeg on top of that. Microwave on high for 3 minutes - stirring once halfway through the cooking time.
In a medium bowl, beat the eggs with the vanilla and salt.
Melt 1/2 of remaining butter in a skillet set to medium-high heat. Pour half of the egg mixture into the skillet. Cover and cook until set. Place this - the bottom half of the omelet - on a cookie sheet. Place apple wedges evenly on top. Sprinkle onion evenly over the apples. Place cheese evenly on top of that. Place in preheated oven.
Cook remaining remaining egg mixture in skillet as described above.
Remove bottom of omelet from the oven and carefully slide it onto a serving platter.
Place egg layer from the skillet on top of the bottom of the omelet from the oven.
Garnish with a little ground nutmeg and cut into wedges to serve.
Make sure you use a sweeter apple for this one. I tried using Granny Smith apples once. It was okay... but not nearly as good as an apple less tart.
Mr Breakfast would like to thank muffin for this recipe.
