Add ground beef, eggs, 1/2 cup milk, bread crumbs, salt, and pepper to the bowl with the onions. Mix with hands until well combined
Place ketchup, dijon, and brown sugar in a small bowl and whisk to combine
Divide meatloaf mixture between muffin cups and top with ketchup glaze. Place in the oven and bake until cooked through, 20-25 minutes
Wash, peel, and dice potatoes. Transfer to a medium saucepan and cover with water. Bring to a boil for 12 minutes or until easily pierced with a fork
Wash, trim, and peel carrots. Slice lengthwise into quarters. Place on a baking sheet and drizzle with oil, season with salt and pepper. Place in oven and bake until golden brown, about 10 minutes
When potatoes are done boiling, drain and return to pan. Add 1/2 cup milk, butter, salt, and pepper to potatoes and mash until smooth