Glazed Sweet Potato Casserole

• 6 sweet potatoes
• 6 ingredients in a saucepan
• 1/2 baking dish
• 450 gr cans of potatoes in syrup (cut light)
• 120 ml pineapple juice
• 60 ml honey
• 55 gr brown sugar
• 30 gr walnuts
• 28 gr butter
• 8 gr cornstarch