1 Preheat oven to 350 degrees. 2 Spray a cookie sheet with non-fat cooking spray. Using a serrated knife, slice bagel vertically into thin, chip-like slices. Arrange on cookie sheet and spray lightly with butter-flavored cooking spray. Sprinkle with Italian seasoning and garlic salt. 3 Bake at 350 degrees for 12 minutes or until crispy.