Hash Brown Casserole

Ingredients

• 2 cans cream of potato soup, undiluted
• 1 cup (225 ml) sour cream
• 1/2 tsp (2 ml). garlic salt
• 2 lbs (.9 kg). shredded potatoes (or frozen hash browns)
• 2 cups (475 ml) shredded cheddar cheese
• 1/2 cup (125 ml) grated parmesan cheese