Easy Chicken Pot Pie

Name: Easy Chicken Pot Pie
Ingredients: 2 teaspoons olive or vegetable oil; 1 cup chopped onion; 4 boneless chicken breast halves cut into 1 to 2-inch cubes, about 4 cups; 2 tablespoons all-purpose flour; Pinch dried thyme; 1 teaspoon kosher salt; 1/2 teaspoon freshly ground black pepper; 1/4 teaspoon paprika; 2 carrots, peeled and chopped; 2 celery stalks, chopped; 4 medium red potatoes, cut into 1-inch cubes; 1 (14 1/2-ounce) can crushed tomatoes; 1 cup reduced-sodium chicken broth; 1/4 cup dry white wine; 1 teaspoon Dijon mustard; 1/2 cup frozen corn kernels; 1 (9-inch) refrigerated pie crust; 1 egg, lightly beaten