Easy Shepherd's Pie (w/roasted garlic mashed potatoes)

This cold weather we've been having called for a good ole comfort-food recipe this week. I decided to make shepherd's pie with my own twist, I topped it with roasted garlic mashed potatoes. A tasty, one dish meal to fill up those bellies after spending an afternoon playing in the snow. Bonus, you could double this recipe and freeze one dish for a quick meal on a busy night.