Cheeseburger Crescent Pockets with Melted Cheese Filling

Ingredients

• 1 lb ground beef or ground turkey
• 1/2 teaspoon salt
• 1/2 teaspoon ground black pepper
• 1 tablespoon dried minced onion
• 2 tablespoons yellow mustard
• 2 tablespoons ketchup
• 4 ounces American cheese, sliced or shredded
• 1 (8-ounce) package refrigerated crescent roll dough
• 1 large egg, lightly whisked
• 1 tablespoon sesame seeds