Cheesy Au Gratin Potatoes | Boar's Head

Ingredients

• Cooking spray
• 3 tbsp Butter
• 1 Small white or yellow onion
• 2 Garlic clove
• 0.25 cup All Purpose Flour
• 1 cup Chicken or vegetable stock
• 2 cups Milk
• 1.5 tbsp Salt
• 0.5 tsp Black pepper
• 2 tsp Fresh Thyme Leaves
• 4 lbs Yukon gold potatoes
• 2 cups Product: 15206 - Boar's Head Sharp Wisconsin Cheddar (Yellow)
• 0.5 cup Parmigiano Reggiano Cheese