Preheat oven to 375 degrees.

Slice the ends off the onion and remove its outer layer. Cut onion into 1/2-inch-wide slices, and separate into rings. Set aside.

Using a blender or food processor, grind Fiber One to a breadcrumb-like consistency. Season the crumbs with spices and transfer to a plate.

Fill a small bowl with egg substitute. Prepare a baking sheet (or two, if you have a lot of rings) by spraying with nonstick spray. Set aside.

Pop-Up Tip! For this next step, try using tongs or a fork to dip the rings into the egg substitute and cereal crumbs -- it'll keep your fingers from getting eggy & crumb-covered. (Don't pierce the rings with the fork; just balance them on it.)

One at a time, dunk each ring in egg substitute, give it a shake to remove any excess, and then coat it in the seasoned crumbs. Evenly place rings on the baking sheet(s).

Bake in the oven for 20 - 25 minutes, carefully flipping rings over about halfway through. Enjoy!