Oyster Stuffing Enough For A 10

• 2 onions
• 1 stalk celery
• 1 black pepper (freshly ground)
• 1 oysters in liquor
• 220 gr butter
• 6 gr salt
• 5 gr parsley (minced)
• 2 gr thyme leaves (fresh)
• 1 slice loaf bread (white)