Crayfish Etouffee

• 5 of garlic (cloves)
• 1 scallion (chopped)
• 1,100 gr crayfish tail meat
• 700 gr onion (chopped)
• 350 ml water
• 350 ml wine (white)
• 325 gr butter
• 270 gr green pepper (chopped)
• 65 gr tomato paste
• 24 gr cornstarch