Turkey Meatloaf TV Dinner

Name: Turkey Meatloaf TV Dinner
Ingredients: Cooking spray; 1 1/4 pounds ground turkey; 1 small onion, grated; 1/3 cup breadcrumbs; 1 stalk celery, finely chopped; 1 large egg, lightly beaten; 1/2 cup ketchup; 1 tablespoon chopped fresh parsley; Kosher salt and freshly ground pepper; 2 teaspoons soy sauce; 1 teaspoon Worcestershire sauce; 1 1/2 pounds russet potatoes, peeled and quartered; Kosher salt; 3 tablespoons unsalted butter, at room temperature; 1/2 cup 2 percent milk, hot; Freshly ground pepper; 1 1/2 cups frozen peas