Onion Gratin

For the onion gratin, peel the onions and cut in half lengthwise. Cut into half rings that are not too narrow. Put them in boiling water for 5 minutes. Drain very well. Cream the butter.

Gradually add the eggs, fold in the Parmesan cheese and chopped chives. Season well with salt, pepper and oregano. Grease a baking dish and sprinkle with breadcrumbs.

Put the onions in and pour the egg mixture over them. Cook the casserole in a preheated oven at 180 °C for about 20 minutes.

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