Make a whole homestyle dinner on one sheet pan. Everyone can enjoy their own mini meatloaf along with roasted green beans and potatoes and there's only one pan to clean!
Preheat oven to 400°F and line a rimmed baking sheet with parchment paper.
Wash the potatoes and cut into ½ inch pieces.
In a bowl, gently mix together the ground beef, milk, bread crumbs, diced onion, salt and 1/4 teaspoon pepper. Be careful not to overwork the meat, just mix it enough to get everything evenly distributed.
Divide the meat mixture into 6 equal pieces and form each portion into a small meatloaf.
In a small bowl, mix together the ketchup, brown sugar, and mustard. Brush over the meatloaves.
Toss the potatoes in 1 Tablespoon of oil, ¼ teaspoon of garlic salt and a pinch of black pepper. Distribute around the meatloaves on the pan.
Bake for 15 minutes.
Meanwhile wash and trim the ends off the green beans. Toss in the remaining Tablespoon of oil, ¼ teaspoon of garlic salt and pinch of black pepper.
After the first 15 minutes of cook time, toss the potatoes around and then put the green beans on the pan. Bake for 15-20 more minutes or until the internal temperature of the meatloaves reaches 160°F.