Preheat the oven to 425° F

Cut the peppers into desired slices (thicker is better)

Lay them out on cookie tray lined with aluminum foil

Cover peppers with desired amount of olive oil

Put salt, black pepper, and any other spices on the peppers

Cook for 20 minutes, flipping the peppers at 10 min

If not a little browned at 20 min, you can leave them in for longer or until desired taste