Directions:
- Preheat the Oven:
- Preheat your oven to 350°F (175°C).
- Prepare the Baking Dish:
- Coat a 9×13-inch baking dish with non-stick cooking spray to prevent sticking and make cleanup easier.
- Prepare the Onions:
- Clean and peel the Vidalia sweet onions. Slice them into rounds approximately ¼ inch thick. Do not separate the rounds into individual onion rings; keep them intact.
- Arrange the Onions:
- Spread the onion rounds evenly across the base of the prepared baking dish.
- Season the Onions:
- Season the onion rounds with salt, garlic powder, and oregano, ensuring even distribution for full flavor.
- Add the Butter:
- Cut the butter into roughly eight even portions or pats. Distribute these butter pats evenly across the seasoned onion rounds in the baking dish.
- Add the Cheese:
- Sprinkle the Italian blend cheese and cheddar cheese evenly over the onion rounds.
- Finish with a final topping of shredded Parmesan cheese for added richness.
- Bake:
- Place the baking dish into the preheated oven. Bake for 35-40 minutes until the cheese is browned and bubbling.
- Serve:
- For optimal taste, serve the dish promptly while it remains warm. The cheese will be gooey, and the onions tender, offering a perfect combination of textures and flavors.