At the end of this rainbow, oh, there’s no pot of gold… there’s something even better! The Ultimate St. Patrick’s Day Casserole will be sitting in all its glory waiting to bring you delicious flavors and all the luck you can ask for! And really, you’ll feel pretty lucky as you simply dig into this hearty bake of tender lamb, tasty veggies, and savory, creamy mashed potatoes! Keep going for the gold and by that we mean another helping of The Ultimate St. Patrick’s Day Casserole!

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  • 2 tablespoons olive oil
  • 1 medium onion, chopped
  • 3 carrots, chopped
  • 2 pounds ground lamb or ground beef
  • 1 tablespoon tomato paste
  • 1 teaspoon Dijon mustard
  • 1 cup chicken broth
  • salt, to taste
  • pepper, to taste
  • 4 cups mashed potatoes, cooked
  • 2 tablespoons butter, melted


Step 1 –Preheat the oven to 350 degrees F.

Step 2 –In a large skillet over medium heat, heat the oil.

Step 3 –Add the onions and the carrots to the oil, and cook, stirring occasionally, until the onions are golden, about 5 minutes.

Step 4 –Add the lamb to the veggie mixture and cook, while crumbling it, until it is no longer pink, about 5-7 minutes.

Step 5 –Add the tomato paste, the Dijon mustard, the chicken stock, the salt, and the pepper to the lamb mixture, reduce the heat, and simmer until the liquid has thickened and has mostly evaporated, about 15 minutes.

Step 6 –Spoon the lamb mixture into a 13×9-inch baking dish.

Step 7 –Spread the mashed potatoes on top of the lamb mixture and drizzle them with the butter.

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Step 8 –Bake until the mashed potatoes have browned, about 50 minutes.

Step 9 –Serve.