Susan Spicer's Garlic Soup

• 5 stems of thyme (fresh)
• 3 stems of parsley
• 1 bouqet garni tied (together)
• 1 bay leaf
• 1/2 loaf french bread stale
• 1,400 ml chicken stock
• 450 gr onions roughly (chopped)
• 190 gr garlic (peeled)
• 30 ml olive oil
• 18 gr butter (unsalted)