No tartness in this quiche.
Pre-heat oven to 350 degrees
Beat eggs in a large bowl with a fork or whisk until combined.
Add milk and yogurt and stir to blend.
Add cinnamon-sugar mix, thyme, and salt & pepper and whisk
Place blackberries in the bottom of the uncooked pie crust. Pour egg mixture over the blackberries.
Bake in center of oven 55 mins to 1 hr