Step 1

Prepare the potatoes by peeling them and cutting them into slices lengthwise, then cutting each slice into french fry-sized sticks. Add the potatoes to a large bowl and cover with cold water. Soak 2-3 hours.

Step 2

When ready to cook, drain the water and lay the potatoes out on a baking sheet lined with paper towels, then blot with additional paper towels to dry.

Step 3

Heat a few inches of oil in a heavy pot to 300 degrees, then add the potato pieces in 3-4 batches so as not to crowd the pot. Cook 4-5 minutes. (The potatoes will still be pale and not fully cooked.) Remove the potatoes from the pot and drain on fresh paper towels, then cook the remaining batches.

Step 4

When all of the potatoes have been cooked at 300 degrees, turn the heat up to 400 degrees. Add the potatoes again in batches, cooking until golden brown and crisp. Drain the fries on paper towels, and sprinkle with sea salt. Serve immediately.