This easy Shepherd's Pie recipe is filled with lots of veggies and tender ground beef or lamb, simmered together in the most delicious savory herb sauce, and topped with the creamiest mashed potatoes. Perfect for St. Patrick's Day, or anytime you're craving some delicious Irish comfort food. | gimmesomeoven.com #shepherdspie #stpatricksday #irish #beef #mashedpotatoes #mealprep #dinner #casserole