Preheat oven to 350 degrees F. Place the chips on a cookie sheet and put them in oven for 4 to 5 minutes.
When oil is visible on the chips, take them out of the oven, and sprinkle with some of the spice rub. Let them cool and serve.
Put the fennel seeds, coriander seeds, and peppercorns in a heavy pan over medium heat. Watch carefully, tossing frequently so the seeds toast evenly. When light brown and fragrant, pour the seeds onto a plate to cool. They must be cool before grinding, or they will gum up the blades.
Pour the seeds into a blender and add the salt. Blend to a fine powder, shaking the blender occasionally to redistribute the seeds. Store in a tightly sealed glass jar in a cool, dry place, or freeze.
Yield: 1 1/4 cups