Shepherd's Pie is one of the best comfort foods with Irish roots. It is a delicious casserole with ground beef, vegetables such as carrots, corn, and peas, topped with mashed potatoes.
Place a large skillet over medium-high heat. Add oil and wait for it to simmer. Once hot, add onion and cook stirring it for 1 minute. Add minced garlic and cook for 30 seconds, just until fragrant.