Baked Garlic Soup With Herb Toast

• 1 head garlic
• 1 sprig rosemary (fresh)
• 1 clove garlic once (cut)
• 1/2 loaf bread see note
• 700 ml vegetable broth
• 40 gr parmesan cheese (grated)
• 16 ml balsamic vinegar
• 16 ml extra-virgin olive oil
• 8 gr garlic chives (minced)
• some herb toast