Double Crust Chicken Pot Pie

Name: Double Crust Chicken Pot Pie
Ingredients: 2 1/2 cup all-purpose flour; 3/4 teaspoon salt; 1 cup (2 sticks) unsalted butter, cold, cut into cubes; 1/2 cup cold buttermilk; 3 tablespoons unsalted butter; 1/3 cup all-purpose flour; 1 1/4 cups chicken broth; 3/4 cup whole milk; 2 ounces cream cheese; salt and pepper to taste; 2 cups cubed chicken meat (I cooked two chicken breasts); 2 tablespoons butter or olive oil; 1 small onion, diced; 1 small garlic clove, minced; 1 cup thinly diced carrots; 1 cup diced fresh green beans; 3/4 cup frozen peas, thawed