Malay-style Chicken & Sweet Potato Stew

• 4 sweet potatoes
• 1 well
• 1,900 ml chicken stock
• 650 gr chickens
• 240 ml unsweetened coconut milk
• 120 ml vegetable oil
• 65 gr all purpose flour
• 45 gr ginger (minced)
• 34 gr cilantro (chopped fresh)
• 32 gr prepared curry powder