How to Make Delicious Onion soup au gratin

Onion soup au gratin.

You can have Onion soup au gratin using 7 ingredients and 4 steps. Here is how you achieve it.

Ingredients of Onion soup au gratin

1. It's of Bermuda onions.
2. Prepare of flour.
3. It's of butter.
4. Prepare of strong beef stock.
5. It's of Salt pepper Parmesan cheese.
6. It's of Celery salt.
7. It's of Paprika.

Onion soup au gratin instructions

1. Peel onions under water slice thin fry in butter until brown.
2. Add flour mixed with butter to onions.
3. Add stock cook in double boiler.
4. Serve hot with grated cheese and paprika.

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