Ingredients:
1. 1 pound ground beef
2. 1 large onion, thinly sliced
3. 2 cloves garlic, minced
4. 1 tablespoon olive oil
5. 1 teaspoon Worcestershire sauce
6. 1 teaspoon soy sauce
7. 1 teaspoon dried thyme
8. Salt and pepper to taste
9. 4 hamburger buns
10. 1 cup shredded Swiss cheese
11. Fresh parsley, chopped (for garnish)
