You will need a preheated 400° oven.
I use a sheet pan for my fries.
I used 4 Russet potatoes this round. Peel and cut into finger sized chunks.
In a mixing bowl, put a couple tablespoons of olive oil, a tsp of chili powder, and your taters.
Toss the taters around until they are coated.
What spices you use are up to you. I often use basil.
Place your slices on the sheet pan and lightly sprinkle coarse salt on them.
Bake 20 minutes, then turn repeat salt sprinkle.
You can also use sweet potatoes.
You might consider spraying the sheet with oil as these stuck. They were good though.