Golden Gruyére Gratin - Alberta Milk

Ingredients

• 1 1/2 lbs (750 g) Yukon Gold potatoes
• 1 1/2 lbs (750 g) sweet potatoes
• 2 cups (500 ml) 2% milk
• 1/4 cup (60 ml) butter
• 2 cloves garlic, minced
• 2 tbsp (30 ml) fresh herbs, minced
• 1/2 tsp (2 ml) salt
• 1/2 tsp (2 ml) pepper
• 1 1/2 cups (375 ml) grated Gruyére cheese