This hearty steak and kidney pie is a meal in itself! Perfectly seasoned beef and potatoes simmer in a rich gravy beneath a flaky crust for a comforting, hearty old-fashioned pie. I like to use milder flavored lamb kidneys instead of beef.
To mellow the robust flavor of kidneys, consider soaking them in cold, salted water or milk for at least 30 minutes, then pat dry. Achieving a good sear on the steak and kidneys before adding liquids is crucial for depth of flavor; work in batches if necessary to avoid overcrowding the pot. When making the flour slurry, ensure it's completely smooth to prevent lumps in your gravy. For an even richer, glossier pastry crust, brush with an egg wash (egg yolk whisked with a touch of water) before baking. Don't skip the slits for steam to escape, preventing a soggy top. Always taste and adjust seasoning before transferring to the casserole.