How to make Vegetarian French Onion Soup

We once had French Onion Soup at a birthday (me and my daughter). I am always a great fan of French Onion Soup. But when we went to some restaurants(multicuisine), French Onion Soup is mainly non-vegetarian, they said as egg is added to it. But recently I came across one recipe where I can make French Onion Soup at home of course Vegetarian one.

Ingredients:
Onion - 1 large
Oil - 1 tbsp
Butter - 2 tbsp
Vegetable Broth - 2 cups (if freezed 4 to 8 cubes depending upon the size)
Grated Cheese - 1/2 cup
Pepper Powder - Required amount
Salt - To taste

Method to make Vegetarian French Onion Soup
In a hard bottom pan add oil and fry the oil till golden brown.Check here for Caramalizing. Add vegetable broth and simmer the stove till it boils. Let the mixture cook for about 15 to 20 mins till it thickens. Add desired salt, butter, pepper powder and grated cheese. Serve hot.

A little amount of caramalized onions can be kept and sprinkled on top before serving the soup.