Cilantro

• 1 spanish onion coarsely (chopped)
• 1 stalk celery coarsely (chopped)
• 1,400 ml chicken stock
• 240 ml cream (heavy)
• 65 gr cilantro (chopped fresh)
• 12 gr ginger root see further (fresh)
• 8 gr butter (unsalted)
• 2 slices garlic (cloves sliced)