Make mini meatloaves, potatoes, and green beans together on one sheet pan for a homestyle meal with fewer dishes to clean. The little meatloaves cook quickly and are topped with a simple sweet and tangy sauce.
Preheat oven to 400°F and line a rimmed baking sheet with parchment paper.
Wash 1½ pounds new potatoes and cut into ½ inch pieces.
In a bowl, gently mix together 1½ pounds lean ground beef, ¾ cup milk, ¾ cup Italian bread crumbs, ½ medium onion, ½ teaspoons salt and ¼ teaspoon ground black 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 ¼ cup ketchup, 1 teaspoon mustard, and 2 Tablespoons light brown sugar. Brush over the meatloaves.
Toss the potatoes in 1 Tablespoons oil, ¼ teaspoon garlic salt and ⅛ teaspoon ground 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 1 Tablespoons oil, ¼ teaspoon garlic salt and ¼ teaspoon ground 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.