How to make Onion Soup Step by Step

Ingredients

• 1 kg. of white onion cut in thin slices
• 1 lt. of chicken or vegetables broth
• 60 gr. butter
• 10 gr. wheat flour
• 200 gr. of grated Emmental cheese
• 1 loaf of bread
• 250 ml. of white wine
• Olive oil
• Salt and pepper to taste