Slice the stale bread into 1 inch cubes.
In a large bowl, whisk together the Just Egg, almond milk, coconut cream, maple syrup, cinnamon, vanilla extract, and kosher salt.
Pour the Just Egg mixture over the cubed bread and gently toss the bread to ensure all the bread had evenly absorbed the egg mixture.
Cover and refrigerate overnight.
The next morning, prepare the brown sugar crumb topping by simply mixing together the flour, brown sugar, cinnamon and cubed butter.
Sprinkle the crumb topping over the french toast casserole and bake for 45 minutes.
Slice and serve!