by , Updated March 30, 2017
This is a delicious side dish for onion lovers, made with a white sauce, sliced onions, and cheese. I use sweet onions in this casserole, but yellow or white onions would work as well.
Prep Time: 15 minutes
Cook Time: 45 minutes
- Heat the oven to 325 F.
- Cut onions into thin slices; separate into rings. Place onion rings in an ungreased 1-1/2 quart casserole.
- For the white sauce, melt butter in a small saucepan; blend in flour and cook for 2 minutes, stirring constantly. Gradually stir in milk. Cook, stirring constantly, until thickened.
- Add salt, pepper, and cheese; stir until cheese has melted.
- Pour sauce over onions.
- Bake, uncovered, in the preheated oven for about 45 minutes.
Serves 6Calories per serving: 289
Fat per serving: 18.9g