Shredded Chicken Sandwich

Bahan-bahan (4 porsi)

• 1 1/2 pounds boneless, skinless chicken breasts (about 3, 8-ounce breasts)
• 1/4 teaspoon kosher salt (plus additional for cooking chicken)
• 1/4 teaspoon ground black pepper (plus additional for cooking chicken)
• 2 tablespoons unsalted butter
• 2 tablespoons all-purpose flour
• 1 cup milk ((I used 1%))
• 1 cup low sodium chicken broth
• 2 tablespoons grated Parmesan cheese (or nutritional yeast)
• 1 1/2 teaspoons poultry seasoning
• 1/2 teaspoon Italian seasoning
• 1/2 teaspoon garlic powder
• 2 slices whole grain bread
• 1/2 cup nonfat plain Greek yogurt
• Whole grain buns
• Shredded sharp white cheddar (Monterey jack, or swiss cheese (optional))