White Onion Soup - cooking recipe

Ingredients

1 1/4 lb. white onions
3 Tbsp. unsalted butter
3 oz. white wine
4 c. water
1/4 tsp. dried oregano
1/4 tsp. dried thyme
1 egg yolk
3 Tbsp. whipping cream
1 Tbsp. all-purpose flour
salt and pepper to taste
2 Tbsp. chopped parsley
croutons (for serving)
Parmesan cheese (for serving)

Preparation

Peel onions and slice thinly.
In a large saucepan, over low heat, melt butter.
Add onions and saute, stirring occasionally, for 20 to 25 minutes, until they are soft.
Add wine.
Cook, stirring gently, until liquid has almost evaporated.
Add water. Bring to a boil.
Add oregano and thyme.
Simmer over low heat, uncovered, for about 45 minutes.