Preheat oven to 425 F. Place oven rack in the middle of your oven.
In a small bowl, combine sugar and cinnamon; set aside.
In a large bowl, combine eggs, salt, flour, milk, and vanilla extract; beat until batter is smooth (the batter will be thin, but very smooth and creamy); set aside.
In a large heavy ovenproof frying pan or a cast-iron skillet (I like to use my 10-inch cast-iron skillet) over medium heat, melt butter, tilting pan to cover sides. Add apples and sprinkle with sugar and cinnamon mixture. Stir and let cook for 5 to 7 minutes to slightly cook the apple slices; remove from heat.
Pour prepared pancake batter over the apples into the baking pan. Place pan in preheated oven and bake approximately 20 minutes or until puffed above sides of the pan and lightly browned (it may puff irregularly in the center); remove from oven.
Remove pancake from the baking pan by flipping upside down onto a serving platter (apples and cinnamon will be on top). Once out of the oven, the pancake will begin to deflate.
To serve, cut into serving-size wedges and transfer to individual serving plates. Serve with an optional dusting of powdered sugar over the top
Makes 1 large pancake of 2 to 4 servings (depending on your appetite).
* Bread four is a high-protein flour. The high protein helps the pancake rise. All-purpose flour may be use, but the results will not be as spectacular.
Apple Pancake Recipe: https://whatscookingamerica.net/eggs/applepancake.htm