Preheat your oven to 400°F (200°C).
In a large skillet, heat olive oil over medium heat.
Add diced onions and carrots; sauté until softened.
Stir in minced garlic and cook for another minute.
Add ground meat and cook until browned.
Mix in tomato paste and Worcestershire sauce.
Pour in the beef broth and add peas; simmer for 10 minutes.
Season with salt and pepper to taste.
Spread the meat mixture in a baking dish.
Top with a layer of mashed potatoes, smoothing it out.
Bake in the preheated oven for 20 minutes or until golden brown.