Cheesy Ham & Potato Casserole

Bahan-bahan (10 porsi)

• 2 pounds (about 915g) potatoes (I recommend Russet or Yukon Gold)
• 2 cups (about 300g or 8 ounces) cubed ham
• 1 and 1/2 cups (150g or 5.25 ounces) shredded sharp white cheddar cheese, divided
• 3 Tablespoons (43g) unsalted butter
• 3/4 cup (100g) chopped yellow onion (1/2 of a large onion)
• 3 g arlic cloves, minced
• 3/4 teaspoon salt
• 1/2 teaspoon fresh ground pepper
• 1/2 teaspoon smoked paprika
• 1/2 teaspoon ground mustard
• 1 teaspoon dried parsley (or 2 teaspoons fresh chopped parsley)
• 3 Tablespoons (24g) all-purpose flour
• 2 cups (480ml) whole milk
• optional, for garnish: chopped fresh parsley, green onion, chives, or hot sauce