Step 1: To wash: Fill large bowl 1/2 way with cold water. Slice potatoes into 1/4-3/8 inch strips. Place cut potatoes directly into cold water. Agitate potatoes to remove dirt and excess starch. Set aside.
Step 2: To make a salt water bath: Fill a second large bowl 1/4 way with warm water (not hot), add Kosher salt, stir to dissolve. Add 1/4 way with cold water. Transfer potatoes from first bowl to salted water bath. Potatoes can be stored in the refrigerator until you are ready to blanch.
Step 3: To Blanch: Heat oil in fryer to 300-degrees F. Shake excess water from potatoes and place in a fryer in batches (the "batches" is when you are making more than just for 1 serving). Drop into oil and allow to cook for 2 minutes and 15 seconds. Remove from oil with a large perforated spatula and shake aggressively to separate fries, if required. Place cooked fries on a sheet tray lined with paper towels. Wait for fry oil temperature to return to 300-degrees F before continuing with next batch. Once done, make sure they are fully cooled until ready for final cooking step. At restaurants, they place the blanched fries into refrigerator.
Step 4: Place fries of blanch potatoes in hot fryer until crisp. Remove fries with large perforated spatula and place on paper towel-lined sheet to drain well. Place fries in a metal mixing bowl and toss with grated Parmesan cheese, truffle oil and salt. Enjoy and dip in Parmesan Lime Aioli.
Step 5: In a small bowl, whisk all ingredients together until well distributed. As it sits, the flavors meld beautifully. Keeps in fridge for a while, therefore, can be made ahead.
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