Delicious Ham and Potato Casserole Recipe - My Homemade Recipe

Ingredients

• 2 tablespoons unsalted butter (¼ stick).
• 1 yellow onion, finely diced.
• 3 tablespoons all-purpose flour.
• 1¼ cups whole milk or half-and-half.
• ½ cup chicken stock or chicken broth.
• ½ teaspoon fine sea salt.
• ½ teaspoon ground black pepper.
• ½ teaspoon garlic powder.
• 2 pounds russet potatoes, peeled and diced small.
• 2½ cups diced cooked ham.
• 4 ounces freshly shredded white cheddar cheese (about 1 cup).