French onion soup is a classy and simple recipe that is so delicious and heart-warming. This easy recipe uses some tricks for more flavor. Adding sugar to the caramelized onions increases their sweetness and helps them brown. Using butter and olive oil to cook the onions helps prevent burning and adds great flavor. Toast some french bread and top with your favorite cheese; broil this and float it on top of each serving of soup for the perfect finishing touch. If you have ovenproof serving bowls, you can put the bread on the soup, top it with cheese, and broil. Be careful when serving this, because the bowls will get hot too. Or, for the classic look of cheese sealed onto the bowls, spoon the soup into six ovenproof bowls and top each with a toasted slice of french or sourdough bread. Divide 2 cups shredded cheese over toasted bread in each bowl. Place the filled bowls on a cookie sheet and bake in 400 f oven for 10 to 15 minutes until cheese is melted and starts to brown. Be careful when eating this-the whole thing is going to be very hotThis soup really is a meal in itself; you don't need anything other than a green salad or perhaps some fresh fruit. Dessert should be simple and light too; perhaps strawberry meringue cream or some ice cream served with fruit.