I found this recipe on the Taste of Home website.  The recipe was for four servings, using an 8 inch cast-iron skillet.  I halved the recipe for my husband and myself and made it in a 6 inch cast-iron skillet and though I didn't do the math to confirm circumference size, it worked perfectly.    

Quantities for a 6 inch  skillet

Ingredients
​

Quantities for an 8 inch skillet

2 strips 
1/2 
1 Tablespoon
​1/4 teaspoon 
1/2  cup
​1 Tablespoon
​3/4 teaspoon
1 small
3/8 cup
1/2 Tablespoon
1/4 teaspoon

Bacon, chopped
​Large apple, peeled & sliced
​Brown sugar
Ground cinnamon
​All purpose flour
Sugar
Baking powder
Egg, at room temperature
Milk
Butter, melted
Vanilla extract

4 strips
​1
2 Tablespoons
​1/2 teaspoon
​1 cup
​2 Tablespoons
1 1/2 teaspoon
1 large
3/4 cup
1 Tablespoon
1/2 teaspoon

Directions:

Preheat oven to 375 degrees.  In your skillet, cook bacon over medium heat until crisp.   Remove bacon to paper towels to drain, reserve enough of the drippings in the skillet to sauté the apple slices.  Add the apple and cook and stir over medium high heat until crisp-tender, 2-3 minutes.  Remove from heat.   Sprinkle with bacon, brown sugar, and cinnamon.  In a bowl combine flour, sugar, and baking powder.  In a small bowl, combine egg, mix, butter, and vanilla; stir into dry ingredients just until moistened.  Pour over apples.  Bake until lightly browned, 20-25 minutes.  Invert onto a serving plate.   If desired, dust with confectioner's sugar ad serve with syrup.