Line a large baking sheet with parchment paper. The baking sheet should be large enough to fit a single layer of potatoes. If needed, use 2 smaller baking sheets. Set aside.
If you like skin-on French fries, wash the outside of the potatoes well and cut into French fries. If you prefer skin-off, peel and cut your potatoes.
Place the fries in a large bowl and wash with cold water to remove as much starch as possible. I like to rinse and drain mine about 3 or 4 times, or until the water runs almost clear. Drain well, then turn your fries onto a large kitchen towel or paper towels. Pat dry.
Return the fries to a dry bowl, and toss in vegetable oil to evenly coat. Turn the fries onto the prepared baking sheet(s) and spread into an even layer, with little overlap.
Place the fries in the center of your cold oven. Preheat the oven to 425°F (with the fries in the oven). Once it preheats, continue to bake the fries in the oven for 15 to 20 minutes, or until golden brown and crispy. Halfway through the bake time, carefully toss the fries so they brown evenly. Take the fries out of the oven and season with salt to taste.