Melt butter in 10 inch frying pan (that can be transferred into oven). Cast iron is optimal. Add in cinnamon, nutmeg, maple syrup, brown sugar. Once melted, add in apples and cook until apples are softened, about five minutes.
Place pan in oven while making batter.
Mix eggs with flour until smooth. Add in milk and vanilla.
Pour batter over apple mixture.
Add in sausage. It's up to you if you want to break it up or arrange in a circle.
Bake for 15-20 minutes until golden brown. Dust with confectioner's sugar. Cut into wedges
If you don't have a frying pan that will go in oven, fry apples on top of stove and pour into a round cake pan, add batter and bake.