Restaurant Style Spinach Casserole is very delicious saute the chopped onions in olive or butter for 5 minutes first. There is no need to add the flour or additional salt. Very outstanding Restaurant Style Spinach Casserole

Ingredients of Restaurant Style Spinach Casserole

1 (10.75 ounce) can condensed cream of celery soup

1 tablespoon all-purpose flour

4 tablespoons butter

1/2 teaspoon garlic salt

salt and pepper to taste

2 (10 ounce) packages frozen chopped spinach, thawed and drained

1 onion, finely diced

Preparation of Restaurant Style Spinach Casserole

In a saucepan, whisk together soup, flour, butter, garlic salt, salt and pepper. Add spinach and onion, cook over medium heat until thick and hot.