In a large skillet, cook the ground beef and chopped onion until meat is no longer pink. Remove from heat and drain off excess fat. Stir in the vegetable beef and cream of mushroom soups, the potatoes and carrots. Season with salt and pepper. Divide filling between 2 - 9 inch pie plates.
Roll pastry to fit the top of each pie. Cover each pie and cut slits in top to allow steam to escape.
Bake in the preheated oven for 45 to 50 minutes, or until golden brown. Let stand on a wire rack for 15 minutes before serving.