To Extract Starch, Change Your Water

In the event that you have reason to believe that your potatoes have grown a starchy outer layer, you may easily release it by swishing them around in the cold water. 

After that, give the potatoes a quick washing with clean water and then pat them dry.

If you want to give them a brief rinse and help them dry off, you can even use your salad spinner.

Additionally, if you intend to soak your fries for a considerable amount of time, you might want to consider substituting the water with another liquid.

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 If your potatoes linger in starchy water too long, excess starch may be harder to drain.

After soaking the spuds for a few hours, you can use fresh, cold water instead of turbid, starchy water for crispier results.

Just toss the French bread pieces with the sauce once it's made, and bake.