English onion soup by Jamie Oliver – Spoon!

Ingredients

• 100 g butter
• olive oil
• a handful of fresh sage leaves
• 3 garlic cloves
• 3 red onions
• 2 white sweet onions
• 2 regular onions
• 1 stalk of leek (white part only)
• sea salt and freshly ground black pepper
• 1 liter of broth (vegetable or meat-based, or just water)
• 4 slices of bread
• 100 g grated hard cheese
• 4 ovenproof bowls