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Preheat oven to 375°F (190°C).

Melt butter in a large skillet over medium-low heat. Add the thinly sliced onion and sauté for 10-15 minutes until softened. Stir in the granulated sugar and continue to cook, stirring occasionally, for another 15-20 minutes, until the onions are deeply golden brown and caramelized.

Pour in the red wine (or beef broth) to deglaze the pan, scraping up any browned bits from the bottom. Cook for 2-3 minutes until the liquid has mostly evaporated and the onions are tender. Transfer the caramelized onions to a bowl and set aside.

In a large mixing bowl, combine the ground beef, breadcrumbs, egg, dried parsley, salt, black pepper, and Worcestershire sauce. Add about 1/3 of the caramelized onions to the meat mixture. Mix thoroughly by hand until all ingredients are well combined, but do not overmix.

Press about half of the meatloaf mixture evenly into a standard loaf pan. Arrange half of the Gruyère cheese slices over this layer of meatloaf.

Cover the cheese layer with the remaining meatloaf mixture, pressing it down gently and shaping it into a loaf.

Bake the meatloaf in the preheated oven for 45-50 minutes, or until cooked through and browned. An instant-read thermometer inserted into the center should read 160°F (71°C).

Remove the meatloaf from the oven. Spread the remaining caramelized onions evenly over the top of the baked meatloaf. Arrange the remaining Gruyère cheese slices over the onions.

Return the meatloaf to the oven for another 5-10 minutes, or until the cheese is melted and bubbly.

Remove from the oven, let rest for 5 minutes, then garnish with fresh chopped parsley before slicing and serving.


Preheat oven to 375°F (190°C).

Melt butter in a large skillet over medium-low heat. Add the thinly sliced onion and sauté for 10-15 minutes until softened. Stir in the granulated sugar and continue to cook, stirring occasionally, for another 15-20 minutes, until the onions are deeply golden brown and caramelized.

Pour in the red wine (or beef broth) to deglaze the pan, scraping up any browned bits from the bottom. Cook for 2-3 minutes until the liquid has mostly evaporated and the onions are tender. Transfer the caramelized onions to a bowl and set aside.

In a large mixing bowl, combine the ground beef, breadcrumbs, egg, dried parsley, salt, black pepper, and Worcestershire sauce. Add about 1/3 of the caramelized onions to the meat mixture. Mix thoroughly by hand until all ingredients are well combined, but do not overmix.

Press about half of the meatloaf mixture evenly into a standard loaf pan. Arrange half of the Gruyère cheese slices over this layer of meatloaf.

Cover the cheese layer with the remaining meatloaf mixture, pressing it down gently and shaping it into a loaf.

Bake the meatloaf in the preheated oven for 45-50 minutes, or until cooked through and browned. An instant-read thermometer inserted into the center should read 160°F (71°C).

Remove the meatloaf from the oven. Spread the remaining caramelized onions evenly over the top of the baked meatloaf. Arrange the remaining Gruyère cheese slices over the onions.

Return the meatloaf to the oven for another 5-10 minutes, or until the cheese is melted and bubbly.

Remove from the oven, let rest for 5 minutes, then garnish with fresh chopped parsley before slicing and serving.
