Preheat the oven to 450°F. Remove the pie crust from the refrigerator and let it warm while you prep the filling.
1 9-inch refrigerated pie crust
Add the olive oil to a 12-inch oven-safe cast iron skillet set over medium-high heat. Add the beef, season with salt and pepper, and cook for 3-4 minutes until it begins to brown. Add the potatoes and cook for another 2-3 minutes. Add the onion and saute for 1-2 minutes, until beef is browned on all sides and vegetables begin to soften.
2 tablespoons olive oil, 1½ pounds chuck steak, 1 teaspoon kosher salt, ½ teaspoon ground black pepper, 1 cup diced onion, 1 cup cubed potato
Stir in the tomato paste, garlic, and thyme, sautéing for 30 seconds.
2 tablespoons tomato paste, 2 teaspoons minced garlic, 1 teaspoon dried thyme
Reduce the heat to medium. Add the wine, deglaze the pan, then cook until the liquid reduces by half, stirring frequently, about 4 minutes. Stir in the flour and cook for 1-2 minutes until pasty.
½ cup dry red wine, ¼ cup all-purpose flour
Add the frozen peas and carrots, broth, and Worcestershire sauce, simmering and stirring until combined and thick. Taste and adjust seasonings if desired, then remove the skillet from the heat.
2 cups frozen peas and carrots, 1 cup low-sodium beef broth, 1 tablespoon Worcestershire sauce
Pour the contents of the skillet into a 9- or 10-inch pie plate. Place the pie crust over the top of the filling, then press the edge against the lip of, crimping to form a seal around the edges. Cut a few venting slices on the top of the pie crust. Optionally, you can brush the crust with milk for a shiny look.
2 tablespoons milk
Place the pie pan on a baking sheet (to catch any drips) and bake for 22-28 minutes, until the filling is bubbly and the crust is golden brown. Allow the pot pie to cool for 5-10 minutes before serving.