2 1/2 pounds (about 4 medium-size) Yukon gold potatoes, unpeeled, scrubbed, sliced into 1/4-inch-thick rounds
1/4 cup extra virgin olive oil
1/2 tsp. kosher salt
1 T. plus 1/2 tsp. garlic powder
2 pounds lean ground beef
1 large yellow onion, diced (about 2 cups)
2 cups barbecue sauce (I love Sweet Baby Ray’s or Stubb’s)
1/2 cup plain dried breadcrumbs

Preheat the oven to 375 degrees F with a rack in the center position. Line a sheet pan with aluminum foil or parchment paper. Place the potatoes on the prepared pan, drizzle with the olive oil, sprinkle with the salt and the 1/2 tsp. of garlic powder, and toss to coat. Spread the potatoes in an even layer and set a wire rack on top. Fold a piece of aluminum foil into a 10-by-6-inch rectangle and place it in the center of the wire rack. Use a skewer or a fork to poke little holes evenly throughout the rectangle of foil—this will help with heat circulation and keep the meatloaf from steaming in its own fat. Gently combine the beef, onion, the remaining T. garlic powder, 1 1/2 cups of the barbecue sauce, and the breadcrumbs in a large bowl. Without squishing and squeezing too much, form the meat mixture into a loaf on top of the foil rectangle. Place the pan in the oven. Bake the meatloaf and potatoes for 30 minutes, then brush the top of the loaf with the remaining ½ cup barbecue sauce. Return the pan to the oven and bake the meatloaf and potatoes until the potatoes are tender and an instant-read thermometer inserted into the center of the meatloaf registers 150 degrees F, about 45 minutes more. Allow the meatloaf to cool slightly before slicing. Serve with the potatoes.