Overnight Cinnamon Pecan French Toast Casserole

10 slices of texas toast-style white bread
2 cups milk
6 eggs
1 1/2 tsp vanilla
3 TBSP sugar
2 tsp cinnamon

Topping:
1/2 cup brown sugar
1/2 flour
3 tsp cinnamon
1/2 tsp salt
4 TBSP butter, chilled
1/2 cup chopped pecans

-Cut bread into 1 inch cubes and place in a greased 9x13 pan
-Prepare topping by using a pastry cutter to combine brown sugar, flour, cinnamon, salt, and butter. After well combined, stir in pecans. Set aside.
-Whisk together milk, eggs, vanilla, sugar and cinnamon. Pour over bread. Cover and chill overnight.
-NEXT MORNING: heat oven to 350 degrees. Sprinkle topping over bread. Bake uncovered for 35-45 minutes.