Skip to main content New<> this month
Get the Allrecipes magazine

Lamb au Gratin

Rated as 5 out of 5 Stars

"A cross between a lamb shepherd's pie and potatoes au gratin. Experiment with your favorite cheeses."
Added to shopping list. Go to shopping list.


2 h 40 m servings 435
Original recipe yields 8 servings


{{model.addEditText}} Print
  1. Preheat oven to 375 degrees F (190 degrees C). Thoroughly grease a covered baking dish.
  2. Heat a large skillet over medium-high heat. Cook and stir ground lamb in the hot skillet until some of the fat begins to render; add onion, carrots, and garlic. Continue to cook and stir the mixture until the lamb is completely browned and crumbly, 5 to 7 minutes. Stir soup mix into the lamb mixture; remove skillet from heat.
  3. Melt butter in a saucepan over medium heat. Whisk flour into butter, 1 tablespoon at a time, making sure there are no lumps between additions. Pour milk into the butter mixture while whisking; continue to whisk until the milk thickens and the mixture is smooth.
  4. Switch heat below saucepan to 'off.' Stir Cheddar cheese and Havarti cheese into the milk mixture until the cheese is melted and the sauce is smooth.
  5. Spoon a small amount of the cheese sauce into the beaten egg in a bowl; whisk together to temper the egg. Pour the tempered egg into the cheese sauce and stir.
  6. Arrange sliced potatoes in the bottom of the prepared baking dish, overlapping to make a layer about 1/2-inch deep; season with salt and pepper. Pour about 1/3 of the cheese sauce over the potatoes and spread into an even layer. Spread the lamb mixture evenly atop the cheese sauce layer. Layer remaining potatoes atop the lamb; season again with salt and pepper. Pour remaining cheese over the top. Cover baking dish.
  7. Bake in preheated oven until the potatoes are tender, about 90 minutes. Remove cover and continue baking until the top browns, about 30 minutes more.

Nutrition Facts

Per Serving: 435 calories; 23 35.1 23.2 106 626 Full nutrition

Explore more


Read all reviews 3
Most helpful
Most positive
Least positive

We raise lamb, so I'm always looking for yummy new ways to prepare it. My family love it, and I can't wait to make it for others. This will definitely become a family recipe.

For some reason I was very skeptical of this recipe but decided to try it to use some lamb. It was delicious. Made it as directed except threw in a cup of peas, could not help myself I love peas...

Delicious! My family loves lamb and this recipe was a nice spin on the traditional shepards pie. The list if ingredients calls for mushrooms but it wasn't included in the instructions. I add...