I had some apples that I wanted to use up and decided to make a pie.

Looking for something different than my traditional apple pie, I found a recipe for a

Sour Cream Apple Pie with Streusel Topping on 

I was out of Sour Cream so I used Greek Yogurt.  

I often substitute yogurt for sour cream and vice versa.

Based on a few of the comments left on Simply Recipes, I was a little concerned about the baking time and whether it would be sufficient for the apples to become tender.

I sliced the apples very thin and I would do so again.

Next  time I would also lower the temperature to 375°F after the first 25 minutes.

Because I found the crust was browning to quickly.

I ended up draping foil over the rim 

because I was afraid it would burn before the apples were tender.

I would definitely make this pie again.

Sour Cream Apple Pie with Streusel Topping

Method

Preheat oven to 400°F.
Beat together sour cream, sugar, flour, salt, vanilla and egg (can beat by hand). Add apples, mixing carefully to coat well.
Put filling into a pie shell and bake at 400 degrees initially for 25 min. (Reduce temperature to 375° for last 20 to 25 minutes)
Remove from oven and sprinkle with Cinnamon Crumb Topping. Bake for and additional 20 more minutes.
Let cool for a hour before serving.

My changes in RED