Preheat the oven to 400°F.

Thinly slice the onion into half-moon shapes by peeling it, then slicing it once from root to tip. Lay the flat side of the onion down, then slice thinly. Place onions on the bottom of a small sheet pan that has a lip around the edge. Don’t let the oil and meat juices drip off in the oven, it could start a fire: use a rimmed baking sheet! I used a quarter sheet pan.

Next, dice the potatoes into 6 pieces each, and add to the sheet pan. Toss the onions and potatoes with the canola oil and a good pinch of salt and pepper.

Next, in a small bowl, combine the ground beef, Worcestershire, mustard powder, onion powder, garlic powder, 1/2 teaspoon salt, and 1/4 teaspoon ground pepper. Mix well with your hands, but don’t over mix. Form two oblong shaped patties with the meat. See photos for size comparison.

Bake for 30 minutes, and serve hot.