1. Preheat your oven to 375°F (190°C) and lightly grease a muffin tin or line with parchment cups.
2. In a large bowl, combine the ground beef, breadcrumbs, Parmesan cheese, milk, onion, egg, ketchup, Worcestershire sauce, garlic powder, oregano, salt, and pepper. Mix until just combined, being careful not to overwork the meat.
3. Divide the meat mixture evenly among the muffin cups, pressing gently to form mini loaves.
4. Top each mini meatloaf with a spoonful of barbecue sauce or additional ketchup for that extra tangy sweetness.
5. Bake in the preheated oven for 20-25 minutes, or until the meat is cooked through and the tops are nicely glazed.
6. Allow to rest for a few minutes before serving. This helps the juices redistribute for a moist and flavorful bite.

Remember, cooking is an art, not a science. Feel free to adjust the spices or add in your favorite herbs to make this recipe truly your own.