Preheat the oven to 325 degrees F (165 degrees C). Lightly grease a baking sheet with olive oil.

Use a serrated knife to slice bagels into 1/8-inch-thick rounds. Arrange in a single layer on the prepared baking sheet.

Stir olive oil, Parmesan cheese, garlic, and Italian seasoning together in a small bowl. Brush flavored oil mixture onto bagel rounds or use a spoon to drizzle over top. If you start to run out of the mixture, you can add a little bit more oil without sacrificing any flavor. Season lightly with salt and pepper.

Bake in the preheated oven until chips are lightly browned, 15 to 20 minutes. Remove from the oven and cool. The chips will become crispier as they cool.