In a small bowl, combine sea salt, freeze-dried garlic, and parsley. Set aside.
Peel the potatoes if desired, or leave the skin on. Cut lengthwise into 1/4-inch thick slices.
Place the cut potatoes in a large bowl filled with cold water and a handful of ice. Soak for 20–30 minutes to remove excess starch.
Drain and pat the potatoes completely dry with paper towels. This step ensures crispy Truffle Fries with Parmesan.
Deep-Fry Method:
Heat vegetable oil in a deep pot to 325°F (165°C). Fry potatoes in batches for 3–4 minutes. Remove and let rest.
Increase oil temperature to 375°F (190°C). Fry again for 2–4 minutes until golden and crispy. Drain on paper towels.
Oven Method:
Preheat oven to 425°F (220°C). Toss dried potatoes with 2 tablespoons oil.
Spread in a single layer on a baking sheet lined with parchment paper.
Bake for 25–35 minutes, flipping halfway, until golden and crisp.
Immediately drizzle with truffle oil, sprinkle seasoning mix, and top with grated Parmesan cheese. Toss gently and serve hot.