They said it takes around 45 minutes to do it that way. The last few times I have made fries, I have done it this way and it is very good. It does not take much time when you finally get ready to make them to eat but it takes some planning ahead.
McDonalds French Fries
Cut potatoes into 1/4-inch strips, soak in water a couple minutes, transfer to pot with water to cover.. about 4 cups. Add 2 Tbsp salt and 2 Tbsp. white vinegar and turn heat on high. When boiling, time for five minutes, then transfer to cold water to stop cooking. Spread on dish towel and dry.
Fry @ 375 for just one minute. Drain and freeze. When ready to cook fry from frozen@ 375 for three minutes, transfer to paper towels, salt and enjoy.