- 1 (8 ounce) package shredded Cheddar cheese
- 2 cups mayonnaise
- 2 cups chopped sweet onion
- 2 tablespoons grated Parmesan cheese
- Preheat oven to 325 degrees F (165 degrees C). Lightly grease a 1 quart baking dish.
- In a medium bowl, mix Cheddar cheese, mayonnaise and sweet onion. Transfer to the baking dish and sprinkle with Parmesan cheese.
- Bake in the preheated oven 40 to 45 minutes, or until onions are tender and the mixture is bubbly and lightly browned.