Preheat your oven to 400°F (200°C) and prepare a baking dish by spraying it with nonstick cooking spray.

In a large skillet over medium heat, brown the ground meat for about 5 minutes, then drain excess fat.

Add diced onion, carrots, peas, and minced garlic to the skillet; sauté until softened (about 6 minutes).

Season the mixture with salt, pepper, and any preferred spices; let simmer for another 2 minutes.

Prepare creamy mashed potatoes if not done already, mixing in butter until smooth.

Layer the meat mixture in the baking dish and top generously with mashed potatoes. Bake for 20-25 minutes until golden brown.