Chicken, Pesto, and Cheese Stromboli

Name: Chicken, Pesto, and Cheese Stromboli
Cuisine: Italian, European, Mediterranean
Ingredients: 1 lb boneless skinless chicken breast; 1 tsp dried oregano; All purpose flour; 1 tsp kosher salt; Freshly ground black pepper; Olive oil spray; 4 tsp pesto; 1 cup shredded mozzarella cheese; 32 baby spinach leaves; 1 large egg; 1 tsp Italian seasoning; 1 cup all purpose flour; 1.5 tsp baking powder; 1/2 tsp kosher salt; 1 cup 0% Greek yogurt