Peel and cut the potatoes into thin, even strips resembling fries. Rinse and pat dry with paper towels.
4 large potatoes
Heat oil in a frying pan or deep fryer over medium-high heat until shimmering and hot (around 350°F / 175°C). Carefully add the potato strips, frying until golden brown and crispy, about 5-7 minutes. Use a slotted spoon to remove and drain on paper towels.
4 large potatoes, 2 tablespoons oil
Preheat the oven to 375°F (190°C). Arrange the crispy fries evenly on a baking sheet. Sprinkle generously with shredded cheese and sliced jalapenos. Bake until cheese melts thoroughly, about 8-10 minutes.
1 cup shredded cheese, 2 jalapenos jalapeno peppers
Optional: In a separate bowl, toss some potato chips if desired for added crunch. Scatter over the baked fries just before serving for extra texture.
1 bag potato chips
Season with salt and pepper to taste. Serve the nacho fries hot, optionally topped with more jalapenos or a drizzle of sauce for extra flavor.