Preheat your oven to 350°F (175°C). Lightly grease a 12-cup muffin tin.
Make the sauce: In a small bowl, mix together brown sugar, ketchup, Dijon mustard, and nutmeg. Set aside.
Mix the meatloaf: In a large bowl, combine all meatloaf ingredients. Use your hands, a spoon, or a meat chopper to mix thoroughly.
Fill the muffin tin: Evenly divide the mixture into the 12 muffin cups, pressing it down slightly.
Bake for 15 minutes, then remove from the oven and soak up any grease with a paper towel.
Top with sauce: Spoon the prepared sauce generously over each meatloaf.
Return to oven and bake for another 10–15 minutes, or until cooked through.
Serve hot, ideally with mashed potatoes and extra sauce.
Tips & Storage
Make ahead: Prepare the meat mixture and refrigerate in the muffin tin overnight.
Freeze: Freeze uncooked mini meatloaves in the muffin tin for 1 hour, then transfer to a freezer-safe container. Thaw overnight in fridge before baking.
Leftovers: Store in an airtight container in the fridge for up to 4 days.