Lamb Shepherd's Pie

True shepherd’s pie uses lamb, not beef. This version keeps things classic and practical: diced cooked lamb mixed with gravy, peas, celery, and onion, topped with mashed potatoes and baked until the edges bubble and the potato crust turns golden.

This is a leftover lamb recipe at heart. If you’ve got a Sunday roast sitting in the fridge, this is what it becomes on Monday. The celery and onion cook briefly in water to soften them without adding extra fat, and that cooking liquid stays in the mix to keep the filling moist.

Spread the mashed potato in an even layer and drag a fork across the top to create ridges. Those ridges catch the butter and crisp up under the high heat, giving you golden peaks over a creamy filling.

Kitchen Tips

• Use leftover lamb gravy if you have it. The lamb flavor carries through the whole dish much better than a store-bought beef gravy.
• Don’t make the mashed potato too thin. A stiff, slightly dry mash holds its shape on top and browns better. Loose, creamy mash sinks into the filling.
• Dot the butter across the potato surface in small pieces so it melts evenly and browns the entire top, not just a few spots.
• Let it rest 5 minutes after baking. The filling is bubbling hot and will be easier to serve clean slices.

Variations

• Add diced carrots or corn to the filling for extra vegetables.
• Top with a mix of mashed potato and mashed parsnip for a sweeter, more complex crust.
• Stir a tablespoon of Worcestershire sauce into the gravy for added depth.