When to use a Hasselback Potato Slicing Rack? Before or after baked potato is done? How long does it take to bake a one pound 5/8 ounces? Thank you.

Hasselback potatoes are sliced BEFORE cooking. Here is a recipe from Food52 for a Hasselback potato casserole that might give you some guidance in baking: https://food52.com/recipes/33049-hasselback-potato-skillet-bake

How long does it take to bake a russet potatoes ( weighs 1 pound 3/4 oz and 1 pound 5/8 oz) in the oven?