Gluten-Free Leftover Roast Beef Shepherd's Pie
A clever twist on traditional shepherd's pie that transforms leftover pot roast into a hearty family dinner. This recipe layers mashed potatoes, corn, and seasoned beef with gravy, then tops it all with a fluffy biscuit crust instead of the usual potato topping. The result is a comforting casserole that's perfect for using up Sunday roast leftovers while creating something that feels entirely new. The biscuit layer adds a delightful texture contrast and makes this dish more substantial than typical shepherd's pie variations.
Ingredients
- 1 small onion, peeled and chopped
- 6 tablespoons butter, divided
- 1 ½ lbs pot roast, cubed (leftover)
- ¾ cup gravy, leftoverleftover gravy1:1sauce
beef or chicken gravy works
- salt
- black pepper
- 3 cups mashed potatoes, leftover
- 1 ½ cups milk
- 2 cups biscuit mix, instant
- 1 ½ cups corn, prepared according to package directions (or mixed vegetables)
Instructions
- 1
Preheat oven to 350 degrees F
- 2
Saute onion in 2 tablespoons butter in a large skillet over medium-high heat
- 3
Add beef and cook until browned
- 4
Add gravy to heat up and season with salt and pepper to taste
- 5
Set beef mixture aside
- 6
Combine biscuit mix and milk until thinner than normal biscuit consistency but not runny
- 7
Spray a 9 by 9 by 2-inch pan with cooking spray
- 8
Layer mashed potatoes halfway up the sides of the dish
- 9
Spread corn or mixed vegetables on top of the potatoes
- 10
Add the layer of meat and gravy
- 11
Pour the biscuit mix over the meat
- 12
Melt remaining 4 tablespoons of butter and drizzle over top
- 13
Bake for 35 to 45 minutes or until top is golden brown
- 14
Let stand for a few minutes before serving
Good to Know
refrigerate covered up to 3 days
assemble completely up to 1 day ahead, add 10-15 minutes to baking time if cold
let rest 5-10 minutes for easier slicing and serving
Common Mistakes
don't make biscuit mix too thick or it won't spread evenly
ensure potatoes go halfway up sides to prevent leaking
let rest before serving to avoid runny portions
Substitutions
use any cooked beef
beef or chicken gravy works
FAQ
Can I use fresh beef instead of leftovers?
Yes, brown 1.5 lbs cubed beef with onions, add beef broth and simmer until tender, about 45 minutes before proceeding.
What if I don't have leftover gravy?
Make quick gravy with 2 tablespoons flour, 2 tablespoons butter, and 3/4 cup beef broth. Cook until thickened.
Can I freeze this casserole?
Yes, assemble without baking, cover tightly and freeze up to 3 months. Thaw overnight and bake as directed, adding extra time.