Start by thinly slicing two medium onions. In a large skillet, melt 2 tablespoons of butter over medium heat, add the onions, and sprinkle with a pinch of salt. Cook for 20–25 minutes, stirring occasionally, until the onions are golden brown and caramelized.

In a spacious mixing bowl, combine 1 pound of ground beef with half of the cooled caramelized onions, 1 teaspoon of garlic powder, 1 teaspoon of onion powder, 1 teaspoon of dried thyme, and 2 tablespoons of Worcestershire sauce. Crack in 1 egg and add 1 cup of breadcrumbs. Mix gently until just combined.

Preheat your oven to 350°F (175°C). Transfer the meat mixture into a greased loaf pan, shaping it into a smooth loaf. Bake for 45–50 minutes, until the meatloaf reaches an internal temperature of 160°F (71°C).

Top the meatloaf with the remaining caramelized onions and 1 cup of shredded Swiss cheese. Return to the oven and bake for an additional 10–15 minutes, or until the cheese is melted and bubbly.

Remove the meatloaf from the oven and allow it to rest for about 5 minutes. Slice and serve warm with your choice of sides.