• 8 ounces elbow macaroni
• 4 tablespoons butter
• 1/4 cup all-purpose flour
• 3/4 teaspoon dry mustard
• 1/2 teaspoon salt
• 1/4 teaspoon ground black pepper
• 1 1/2 cups milk
• 1 cup light cream or half-and-half
• 12 ounces mild cheddar cheese, or a combination of mild and sharp, divided
• 12 ounces frozen peas, thawed
• 8 ounces diced ham
• 1 tablespoon fresh chopped parsley, optional

Topping

• 1 cup fresh breadcrumbs
• 2 tablespoons melted butter