Cordon Bleu Baked Pierogies - Mrs. T's Pierogies

Ingredients

• 1 box Mrs. T's® Pierogies Classic Cheddar Pierogies
• 1 cup diced rotisserie chicken
• 1 cup diced ham
• 4 tablespoons unsalted butter
• 1/4 cup all-purpose flour
• 2 cups whole milk
• 1/4 cup grated Parmesan cheese
• 1 tablespoon lemon Juice
• 1 tablespoon Dijon or yellow mustard
• 1/2 teaspoon garlic powder
• 1/4 teaspoon kosher salt
• 1 1/2 cups shredded Swiss cheese
• 1/2 cup panko breadcrumbs
• 2 tablespoons unsalted melted butter
• Fresh herbs for garnish