Garden Harvest Chicken Pie

• 1 pie crust
• 1 onion thinly (sliced)
• 325 ml milk
• 300 gr potatoes-cubed
• 280 gr chicken breasts without skin cubed
• 150 gr peas (frozen thawed)
• 120 gr corn kernels (frozen thawed)
• 95 gr carrots (frozen thawed)
• 30 ml chicken bouillon granules
• 16 gr all purpose flour