Smoked Scalloped Potatoes - Potatoes USA - Philippines

Ingredients

• 3 Tablespoons Butter
• 4 Large Garlic Cloves, minced
• 1 Small Yellow Onion
• 2 Cups Whole Milk
• ¼ Cup Flour
• 1 Cup Chicken Stock
• 1 Teaspoon Coarse Black Pepper
• 1-½ Teaspoons Kosher Salt
• 3 lbs. Russet Potatoes
• 2 Teaspoons Fresh Thyme, chopped
• 3 Cups American Cheddar, grated, the older the better
• 1 Cup Parmesan Cheese, grated