Mom's Crispy Chicken And Potatoes

• 8 skinned chicken thighs
• 1 egg
• 150 gr corn flake crumbs
• 120 ml prepared barbecue sauce
• 60 ml honey
• 60 ml prepared mustard (yellow)
• 45 ml water
• 3 gr salt
• 3 gr pepper
• 2 gr sage (dried)