Shepherd’s Pie with Mushrooms, Stout and Potatoes | Mushroom Recipes

Ingredients

• 2 pounds American lamb stew meat, or shoulder or leg cut into 1-inch cubes
• Salt and freshly ground pepper
• 2 tablespoons olive oil
• 6 tablespoons unsalted butter
• 1 large yellow onion, diced
• 3 carrots, peeled and sliced into 1/4-inch-thick rounds
• 3 stalks celery, sliced 1/4-inch thick
• 8 ounces crimini or button mushrooms, halved
• 2 garlic cloves, minced
• 6 tablespoons all-purpose flour
• 2 cups lamb stock, such as Saffron Road, or low-sodium beef broth
• 1 cup Irish stout, such as Guinness
• 2 teaspoon minced fresh rosemary
• 2 1/2 pounds Yukon Gold potatoes, peeled and cut into large chunks
• 1 cup sour cream
• 3 tablespoons prepared horseradish
• 1 cup frozen peas