1. Preheat oven to 375 degrees F and line two cookie sheets with parchment paper. Grease parchment paper for easy removal.
2. Slice onions into very thin rounds, discarding outer skin. Aim for about 16 rounds.
3. Arrange 8 piles of the cheddar cheese on each cookie sheet.
4. Press an onion round on top of each pile then sprinkle with ranch seasoning.
5. Bake for 11-13 minutes, watching closely, Cook time will vary some based on onion slice thickness.
6. Allow crisps to cool for 5-7 minutes before removing from sheet.
7. Serve with marinara sauce or ranch dressing.

Credit: Recipes Need