Rich, savoury minced beef cooked with diced carrots and celery under a smooth, buttery mashed potato crust.
Not gluten free as written. Swap the plain flour, check your stock, and use balsamic vinegar instead of Worcestershire sauce.
Scatter two handfuls of grated cheddar cheese over the mashed potato before baking for a rich, golden crust.
For extra depth in the meat sauce, pour in a splash of red wine just before adding the stock.