Place oven rack in middle position.
Preheat oven to 400 degrees.
Generously grease a 9-inch oven-safe skillet.
Beat eggs until well bended.
Add flour, sugar, salt, vanilla and milk.
Beat until smooth.
Stir in 2 tablespoons melted butter.
Pour into prepared 9-inch skillet.
Place sliced apples around the top of the batter.
Sprinkle with ¼ teaspoon ground cinnamon.
Top with ¼ cup brown sugar.
Bake for at least 30 minutes – until pancake is puffy.
Serve with butter and maple syrup if desired.