In the US, Shepherd's pie, Hachis Parmentier, and Cottage pie are similar dishes made with different meats. Despite Shepherd's pie traditionally using ground lamb and Cottage pie using ground beef, most Americans associate the dish with ground beef.
Simmer mixture, reduce heat, stir occasionally until slightly thickened (~10-15 mins). Add peas and corn, stir until heated. Season with salt and pepper. Set aside.
Cool beef layer before topping with mashed potatoes to prevent sinking. Firm mashed potatoes are better to keep level while baking. Avoid making them too runny.
'Tis is the season for shepherd’s pie; rich and savory, filling and cozy, everyone needs to know this recipe. Are you a shepherd’s pie fanatic like me?