Ingredients:

2 pounds ground beef

2 large onions, thinly sliced

2 tablespoons butter

1 tablespoon olive oil

1 cup beef broth

1/2 cup breadcrumbs

1/2 cup grated Gruyere cheese

2 eggs

2 cloves garlic, minced

1 tablespoon Worcestershire sauce

1 teaspoon dried thyme

Salt and pepper to taste

Directions:

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