This dish represents the comfort and love of Molly's gran, whose teachings and recipes guide Molly's life even after her passing.
Preheat oven to 400°F.
Cook ground beef in a pan over medium heat until browned.
Add onions, carrots, and peas, cooking until vegetables are tender.
Stir in tomato paste, season with salt and pepper.
Transfer mixture to a baking dish, spread mashed potatoes on top.
Bake for 20-25 minutes until potatoes are golden.