Combine milk, ketchup, oats, garlic powder, and salt in mug.
Spoon ground beef into mug.
Stir ingredients thoroughly.
Cook on high for 3 minutes, or until meat is cooked through.
Allow to cool and serve with additional ketchup, as desired.
Meatloaf has always been one of my favorite things to eat, and now I can cook myself a single serving without having to make an entire meatloaf. I definitely plan to try this incredibly simple recipe as soon as I can!