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:
